Many national and state parks in the United States allow campervan parking and camping. In
California, some of the popular national and state parks that allow campervan parking include:

1. Yosemite National Park: Yosemite has several campgrounds that can accommodate
   campervans, including Upper Pines, Lower Pines, and North Pines.
2. Joshua Tree National Park: Joshua Tree has several campgrounds that can
   accommodate campervans, including Black Rock, Indian Cove, and Jumbo Rocks.
3. Redwood National and State Parks: Redwood has several campgrounds that can
   accommodate campervans, including Jedediah Smith, Mill Creek, and Elk Prairie.
4. Big Sur State Park: Big Sur has several campgrounds that can accommodate
   campervans, including Pfeiffer Big Sur State Park, Andrew Molera State Park, and Julia
   Pfeiffer Burns State Park.
5. Death Valley National Park: Death Valley has several campgrounds that can
   accommodate campervans, including Furnace Creek, Mesquite Spring, and Stovepipe
   Wells.
   It's important to note that each park may have its own specific rules and regulations regarding
   campervan parking and camping, so it's a good idea to check with the park ahead of time to
   make sure you're aware of any restrictions or requirements.