I like Sue's approach. Scare the pants of the adults with real world events, then figure out positive ways to enable the kids, giving them strategies to deal with common scenarios.

One thought: kids seem to absorb or integrate this sort of thing if they do it with their own hands. Theoretical knowledge doesn't really connect with behaviour until they do it, hands-on. So, giving scenarios to small groups in a campground or nature area, with resources provided, can keep it interesting and contribute to true learning. For example: give each group a scenario and a location, let them analyze and come up with a plan, then have an adult listen to their plan and give suggestions, and have them implement the plan. And move them to the next station/scenario. Followed by hot chocolate, of course.

My $0.02.