Yes, you can camp overnight in Yellowstone, but it is strictly regulated and requires advanced planning. The park offers two types of camping: Frontcountry (developed campgrounds with amenities like toilets and fire rings) and Backcountry (remote sites reached by hiking or boat). For 2026, almost all frontcountry sites must be reserved months in advance via Recreation.gov or "Yellowstone National Park Lodges." If you are heading into the backcountry, you are legally required to have a Backcountry Permit for every night you stay. These permits specify a designated site and can be obtained through an "Early Access Lottery" that typically runs in March, or as a "walk-up" permit if any are left. Camping outside of these designated areas is strictly prohibited to protect the environment and prevent dangerous encounters with grizzly bears. In 2026, the recreation fee is $5 per person per night plus a $10 reservation fee, and you must adhere to strict "bear-aware" food storage rules at all times.