Earlier I mentioned that I had two books that covered camping that was free (or at least $12 or less). They covered some less visible opportunities such as Corps of Engineers or municipal sites. Had an inquiry about them so I'll post the titles here. Don Wrights Guide to Free Campgrounds Eastern Edition - Now Includes Campgrounds 12 and Under in the 29 Eastern States (Paperback) Don Wright's Guide to Free Campgrounds: Western Edition (12th Edition) (Paperback) Easy to find on the internet. I'm sure there are other good books on the same subject but these are what I used.