Next time you're in eastern washington check out this camp ground near patterson washington. www.crowbutte.com
It used to be a state park but is now run by a local association. They have about 45 full hook up sites right on the columbia river, bathrooms, dump, boating, fishing etc. It is drop dead lovely and fairly remote. There are a few wineries near by including columbia crest and a wildlife refuge. The landscape is windswept and beautiful. The camp is open year round and would make a great minirally location.