Trek Biker from St. Joseph, MO on 6/22/2006 2:57:44 PM:
I've parked in the lot east of the Trailhead and museum. The people that live adjacent to the lot keep an eye out on the lot according to the folks at the museum. You can also leave your name, car info, how long you plan on leaving your car, and cell number at the museum in the event they need to contact you. I left my car there for four days over Memorial weekend and it was not bothered.