usa – How can I figure out the full list of camping options in a given state?

Camping season is coming up in the US and I’d like to head out camping. I’m planning to stay in Washington and Oregon but flying to other states is not out of the question. Is there a resource that would show me 100% of possible camping locations in a given state, including county, state, federal and private campsites? Ideally it should also include a map showing locations open to dispersed camping.