Many MANY years ago, a member called Colorado Cop took Boy Scouts on camping trips quite often. He related that one of the more useful mods he did was to hang a skirt around the outside of the rear bed of his TM. He could stash stuff there out of sight at night, or during rainstorms. Perhaps it would be useful for your Cub Scouts as well.
Although there were several threads on the topic, his initial thread can found at
http://www.trailmanorowners.com/foru...read.php?t=117
Unfortunately, the pictures have disappeared.
Bill