My friend and I are planning a long roadtrip through a bunch of national parks in August in my 2021 Model 3. We do plan to sleep in the Model 3 with Camp mode, while we are at each of the National Parks. We plan to hit Mt. Rainier, Yosemite, Grand Canyon and Yellowstone, and plan to spend 2 nights Tesla camping in each one.

I haven't camped before so this will be a brand new experience for me. I'd rather sleep in the car comfortably on a mattress than set up a tent and everything. I'd also like to be at campsites where there are bathrooms and showers. I'd love to hear from people who have camped in their Tesla at these national parks about their experience. Looking for recommendations for mattresses to get for the car as well as good campsites at each of these places with bathrooms and showers. Being able to charge the car at the campsite would be nice, but not a necessity since we're gonna be stopping at superchargers anyway!

Any advice/recommendations can be helpful :) Thanks a lot!