SteveK from saint louis, MO on 8/22/2011 9:43:24 PM:
Weldon Spring TH is at MM 56, St. Charles TH at MM 40, and Klondike Park at MM 64, so I don't see Weldon Spring TH working for what the original poster wants to do.
For the DNR ride in June when they start the ride in St. Charles, the City of St. Charles lets that group camp at Frontier Park, which is right on the riverfront in downtown St. Charles. You may try contacting the City of St. Charles Police Dept. at (636)949-3300 and discuss with them. This is also the number you need to call if you want to leave your car in Frontier Park overnight and not get it towed away.
I'm also wondering why camp if you live in St. Charles just go home.