RE: Cleaning off Valves
Fed case for donuts in a field, sure it sounds logical but it's a bit of a stretch of what 'could' happen.
Land Between the Lakes (LBL) has an offroad park called Turkey Bay, lot of fun when I was last down there in October. Word has it that the FS has done some 'improvements' to the offroad park, meaning the bulldozed many of the fun play areas. It's $15 for a 3-day pass, and well worth it.
We're there every October for a local club's Octoberfest.