Within Yosemite National Park, you may not sleep in your car or RV except in a campsite that you're registered to stay in (except at Camp 4, where sleeping in cars is not allowed because it's a walk-in campground). Sleeping in your car along the side of the road is not allowed.
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American black bears found in Yosemite National Park have long been of intense interest to park visitors and managers. Seeing one of the approximately 300 to 500 black bears in Yosemite can evoke excitement, awe, and fear. If visitors spot a bear while in the park, it is a black bear-not a brown or grizzly bear.
Make sure you know before you go. In national parks where grizzlies live, such as Glacier or Grand Teton, rangers encourage you to carry bear spray. In others, such as Yosemite, where only black bears live, bear spray is not even permitted.
You can sleep in your car in Sequoia National Park at an established campsite. However, you cannot park in parking lots or along the road and sleep in your car. This style of car camping is called “dispersed camping” and is only allowed in certain places on National Forest or BLM land.
Staying Inside of Yosemite National ParkI recommend staying inside the park if you want to have more opportunities for sightseeing without the crowds. You'll find some incredibly scenic lodges and campgrounds here that will enhance your experience while you're here.