I would encourage you to step up and let the scoutmaster know you have some particular skill, such as survival, and that you'd like to integrate that knowledge and skill into the program. Most Scoutmasters would welcome such offers with open arms. (or at least they should.)
One thing we do when we have new adults "cross over" with their boys is we have them do a skills inventory kind of questionaire. It's a way to see if parents have any particular skills/interests that might help add depth to the troop. There might be merit badge counselor opportunities, future scoutmasters out there, who knows. The parents are usually happy that we even ask, and many of them do want to help, they just don't know how. We encourage them to get as much BSA training as they can handle, our council is now running all training for free, to encourage it.
Sounds like the adults on the Scout trip that needed rescue, that was mentioned in an earlier post, might have benefitted from some of the readily available BSA courses like Outdoor Leadership Skills and Trek Safely, to mention a couple.
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- Ron