stevek from saint louis, MO on 3/30/2012 12:19:51 AM:
Brian, what I do is call the St. Charles Police Dept. at (636)949-3300 and request that they give you permission to leave your car in Frontier Park's parking lot(there are signs up for no overnight parking allowed). They ask for license number, contact info, etc., but there is no charge. I always tell them I am leaving it right behind the the Country Inn & Suites hotel, so they have an approximate location. That will put you on the trail at Mile Marker(MM) 40 instead of Black Walnut(MM30), but I think it is a little better option.