There is a 5/5 cache in the Mark Twain NF in SE Missouri. I am planning a trip to attempt this one in late September or early October (as soon as the weather will be a little easier on backpacking). If there are any backpackers here that want to attempt this one, it will be an open trip. One night near the trailhead, two days hiking (about 15 miles) and one night near the 11pt River.