You may want to camp on the beach. Or visit all of these areas one by one. There are national parks, national forests, state parks and recreational areas, county and city parks, and private campgrounds. Campgrounds run by national and state agencies are almost always well maintained. Many county and city parks can be great, too, but their quality varies.
Private campgrounds vary wildly, with some being like neighborhoods and others being rather dumpy.
But never compromise your safety. If you feel unsafe in a campground, don't stay. All rights reserved.