Car Camping
The cheapest way to sleep outside is the vehicle already in your driveway. The hard parts are legality and condensation, in that order.
Car camping needs no build and no budget. A sedan with the seats folded and a decent pad is a legal place to sleep across most of the country, and it costs nothing to try. That is the whole appeal, and it is a real one.
The catch is that "can I sleep in my car here" has no national answer. Some states are silent, which pushes the question down to the town. Plenty of cities have ordinances banning vehicle habitation, some enforced only when a neighbor complains. A rest area in one state gives you ten hours and the next one over gives you two. Checking that before you drive somewhere planning to sleep is the single most useful thing on this page.
The other thing nobody warns you about is water. A person breathes out roughly a pint of it overnight, and in a sealed car all of that ends up on the glass and the ceiling. Crack two windows on opposite sides, even when it is cold. Everything else here is comfort.
Featured guides
All guides →Everything on Car Camping
Can you legally sleep where you are parked?
Car sleeping is governed state by state, and in a lot of places town by town. Our rest area tables show what each state DOT allows, with the policy linked and the date we checked it. Look it up before you commit to a spot at midnight.
See the state rules →Latest articles
Coming soon - Coming soonWhat to keep in the trunk so an unplanned night out is not a miserable one.
Reflective foam and a marker does it for about $20. When the fitted set is worth it.
Why some cities ban sleeping in a legally parked car, and how to find out if yours does.
Common questions
It depends entirely on where the car is parked. There is no federal rule and no single state answer. Many states are silent, which pushes the question down to city ordinances, and a good number of cities ban vehicle habitation outright. Rest areas are governed by the state DOT and range from ten hours down to two, or prohibited. Public land is usually the most permissive. Check the specific place before you rely on it, and if a sign says no, believe the sign.
Not from sleeping in a parked car with the engine off. The real risk is running the engine for heat, especially with snow or mud packed near the exhaust, which can push fumes back into the cabin. If you run the engine to warm up, check the tailpipe is clear, keep it brief, and never do it while you are asleep.
Ventilate. Crack two windows on opposite sides by about an inch so air moves through the car, rather than one window that just makes a cold spot. It feels wrong when it is cold out and it is still the right move: sealing yourself in means the pint of water you exhale overnight ends up on the glass, your bedding, and the roof liner.
A rest area, generally. They are lit, there are other people, and if the state allows overnight parking you are unambiguously supposed to be there. A store lot depends on the store and often on the individual manager, and "I asked and they said fine" does not travel to the next town. The safest spot is the one you are clearly allowed to be in, because then nobody knocks.
You need flat before you need thick. Folded seats leave a slope and a gap, and no pad fixes geometry. Level the surface with a platform or by filling the footwells, then two to three inches of pad is plenty. In the cold, R-value matters more than thickness: the steel floor pulls far more heat out of you than the air does.