Great Answers, AH64ID!
I would also suggest that before you boondock camp on NF lands, stop by the Ranger Station and specifically ask them about their boondocking policy. Those MVUM maps are sometimes a nightmare to read or understand or navigate with. The policy on what info can be on those maps was dictated by Wash DC, and the local Forest Officers would have liked to make them much more user friendly, but weren't allowed to. They may even give you some excellent suggestions about great places to boondock. (I know this, because I had to put these maps together and was frustrated by what info could go on them - now I'm retired).