Great experience x2! I stopped at lake Anna spot #32 twice within a week. I stopped there headed north, and when I headed back south. I made a reservation, in traffic, for the wrong day. I called and the clerk changed it with no issues. Lake Anna is a man made lake, and had a railroad to accommodate the train cars shipping out gold! You cannot pan for gold though without a "Special use permit" so I didn't end up doing that. I did however park my camper, hook up to power and water, then I dumped my tanks in the large clean area designated. There is also fresh water at the dump site. Staff is friendly, informed on the history of the area, and very prompt with site turn over. I look forward to exploring on day when I'm not just passing through.
There is a handicapped accessible yurt, and cute cabins available, and by cute, I mean they seem tiny! I haven't seen the inside, so I can't be sure what's in them, but maybe a bed and a fridge? I can't imagine much more.
Cool park though, no discounts, no military, nothing, but it was a convenient place to stop.