We camped all across the USA, Canada and Alaska. We had a 30 foot motor home. We could find a spot in almost any National Park, State Park or other. However, if you go over that length things get more difficult. Most National Parks only have a few campsites that accommodate 40 feet. They are always filled fast. Get there early and you should find a spot. Later in the day and the biggest ones are gone.
Our National Park campgrounds were built for another generation of campers. They are outdated for today's motor homes and campers. Canada has beautiful National Park campgrounds. It makes you a bit ashamed of ours.
We do lots of boondocking also. Going smaller will get you the best boondocks.
