I used the tip about being first at getting to up to the top level on the Mark Twain Riverboat and knocking on the door marked "Private" just this week. They were changing CM piloter's at that time and the new CM told my group of 5 that they don't do that. When I questioned him some more the CM told us that there was a missing floorboard up in the cabin and with the liability they are not letting anyone up. The couple of times that I saw the MTR, there was no other people in the pilot cabin. Just wanted to confirm / notify other Dis'ers looking to do this if there is something I missed, did wrong?