How To Keep Car Warm When Sleeping In It?

Sleeping in a car during the chilly winter months can be a unique and adventurous experience. However, it's essential to ensure warmth and comfort to make the most of this adventure. This article delves into the various methods and tips to stay warm and cozy while sleeping in your vehicle, ensuring a memorable and safe experience.

The Basics of Car Camping

Car camping is an exciting way to experience the great outdoors without the hassle of setting up a tent. Unlike traditional camping where you drive to a campsite and pitch a tent, car camping involves sleeping directly in your vehicle. This method offers the advantage of having all your necessities within arm's reach and provides a more secure shelter against the elements. Especially during the winter months, sleeping in your car can be a game-changer, allowing you to wake up to serene snow-covered landscapes right outside your window.

The Importance of Proper Bedding

Ensuring a warm and comfortable sleep in your car starts with the right bedding. A common misconception is that the car's shelter is enough to keep the cold at bay. However, as many seasoned car campers will attest, a vehicle can get as cold as a tent during the night. 

Investing in a good quality sleeping bag, especially one rated for winter temperatures, is crucial. An insulating sleeping pad beneath you can make a significant difference, preventing the cold from seeping in from below. Remember, when you're sleeping in your car, you don't have to be as concerned about the size and weight of your bedding. If it fits, bring it along! A well-insulated sleeping arrangement can transform your car into a cozy winter haven.

The Power of Wool

Wool has been a trusted material for centuries, known for its incredible insulating properties. Unlike cotton, which can trap moisture and become a freezing layer in cold conditions, wool acts as a natural insulator, keeping you warm even when damp.

Sleeping on top of a wool blanket can shield you from the cold emanating from the car's floor. Additionally, wearing woolen clothing, especially merino wool long underwear, can significantly enhance your warmth. For those extra chilly nights, consider the "wool sandwich" technique: place one wool blanket beneath your sleeping bag and another on top. The result? A snug and toasty sleep environment.

Quick Insulation with Sunshades

While sunshades are typically associated with blocking out the sun during hot summer days, they can be a car camper's best friend during winter. Made from reflective, insulating material, sunshades, or Reflectix, can be cut to fit your car windows, providing an additional layer of insulation.

Not only do they keep the cold out, but they also prevent the early morning sun from disturbing your sleep. Moreover, they offer an added layer of privacy, ensuring that your car camping experience remains discreet. For those looking to maximize warmth, covering all windows with sunshades or Reflectix can create a dark, warm refuge, perfect for winter car camping.

Using Boiled Water for Heat

One of the simplest yet most effective methods to introduce warmth into your sleeping environment is by using boiled water. Before settling in for the night, boil some water and fill a durable water bottle. Wrap this bottle in a towel to prevent direct contact with your skin and place it inside your sleeping bag. This makeshift heater can provide a source of warmth, helping you drift off to sleep comfortably. While the heat might not last the entire night, starting off warm can make a significant difference in maintaining a comfortable temperature throughout.

The Risks of Propane Heaters

While the allure of a propane heater might be tempting, it's essential to approach this option with caution. Propane heaters, such as the popular Little Buddy Heater, are designed for small spaces and can effectively warm up a car. However, they consume oxygen as they operate. If you're considering using one, it's imperative to crack a window to ensure proper ventilation.

Many modern propane heaters come equipped with an Oxygen Depletion Sensor and an automatic shut-off feature. Even with these safety measures, it's recommended to use the heater only before sleeping and not while you're asleep. The risk of carbon monoxide poisoning or reduced oxygen levels is too significant to ignore. For many, the safer and simpler hot water bottle method might be the better choice.

Lighting Considerations

While the interior lights of your car might seem like the most convenient source of illumination, relying on them can quickly drain your car's battery. Instead, consider alternative lighting options. Portable lanterns, headlamps, or even string lights can provide ample light without risking your vehicle's battery life. 

Having a designated spot in your car for a headlamp can be especially useful. As winter days are shorter, you'll likely find yourself setting up or settling in after sunset. A headlamp not only keeps your hands free but also directs light precisely where you need it.

Managing Moisture

It might seem counterintuitive, but even in the cold, moisture can be a concern. Breathing inside a closed car can lead to condensation buildup on the windows and surfaces. Over time, this moisture can make the interior damp and chilly. To combat this, it's advisable to crack a window slightly. This small opening allows moisture to escape, ensuring a drier and warmer environment inside.

Preparing for the Trip

Before heading out on your car camping adventure, a bit of preparation can go a long way. If you plan to stay at a designated park or campground, call ahead to check for availability and any winter-specific closures. 

For those who prefer a more off-the-beaten-path experience, U.S. Forest Service roads can be a good option, provided you don't obstruct traffic. Always have a backup plan, such as a friend's driveway or certain commercial parking lots that allow overnight stays.

Lastly, remember that many facilities might be closed during the winter. Bring essentials like toilet paper and familiarize yourself with Leave No Trace principles, especially if you're considering more remote locations.

Testing Before the Real Adventure

If winter car camping is new to you, consider doing a trial run closer to home. This test allows you to familiarize yourself with the setup and identify any additional needs or adjustments. By ensuring everything is in order during this trial, you can embark on your actual adventure with confidence and peace of mind.