I have personal objections to D&D, but if the others on the trip bring it to play I have no objection.
I do, however, strongly disagree with:
"...if youth are spending time playing a game at Scout Camp they obviously aren't signed up for enough merit badges"
Scouts usually have an appropriate amount of down time. I have seen scouts that don't believe in down time so they take 5+ MBs but they usually dont have a really great time at camp. Scouts is NOT about advancement, thats a side thing. It is about FUN.