Taurus,

Thanks for offering to instruct Scouts on important skills. There is a key Scout document called "The Guide to Safe Scouting" available online at http://www.scouting.org/HealthandSafety/Resources/Guidetosafescouting.aspx

It says that "Hunting is not an authorized Cub Scout or Boy Scout activity, although hunting safety is part of the program curriculum." but does not say that butchering is not allowed. Still, I would recommend that you let Scout leaders and parents know that you'll be covering this in case they feel it is not appropriate for their sons.

It gives specific rules & recommendations for climbing & rapelling.

Paragon & others gives some good suggestions indeed. I myself would stick to the survival/navigation topics and stay away from the hunting/dressing/trapping topics. Young boys LOVE to learn how to build natural shelters, build fires, and use survival tools (whistles, signal mirrors, knives). Keep it simple. Their coordination is such that use of saws and hatchets can be dangerous to them (hands & fingers in the wrong place & time), so take use of these tools very seriously.

Keep in mind that some of these guys could be just 11 years old. Short attention spans. More likely than not, some may have behavior issues that need to be considered. Some love to get dirty and others hate it. Be flexible.