We used public parks almost exclusively during our 16 years of full-timing and had absolutely no issues with our 40' motorhome. There are many options instead of California's state parks which are in a separate class than other states. For instance, we've used every single one of Arizona's state parks with plenty of room. There are very nice national forest campgrounds, county and city parks. We also used national parks such as Yellowstone, Glacier, Grand Teton, etc. and without reservations. We don't need hookups.