Hey, Scouting is fun, so why not have some fun with the photos. Less successful will be posed photos made to be funny. Better will be spontaneous acts of true emotion or photos of serious things that appear to be something else, creating a conflict between the real and the perceived.
Related to Humor is The Unusual.
See also how expert photgraphers portray Humor,
Boy Scout Troop 174, Yorktown, NY. Scouting Photography Pages at http://troop174.info