What I have seen:
Glow sticks for the night for everyone
Make a gateway for your camp - good learning experience for lashing/knots
Dutch oven desert
Ranger beads for hiking - had cool skull beads
Design and get matching "special" camp shirts
Ask the camp director about opportunities not listed
Arranged private time at the shotgun range for the troop
Hope these spur some ideas for you. Bravo for thinking about this. Fun rules!
Advisor and Coach
Owl - Whooo R U?
2005 National Jamboree Staff - Action Center A Trapshooting
2010 National Jamboree Troop 826
Wood Badge SM WE4-33-08
"Turning Boys into Men, One Scout at a Time"