It would be interesting to create a mid-hike scenario where you stop the group, have them tie their feet together, and then tell them they need to get back to the car(s) without untying their feet and/or prepare to stay put until rescued. During the scenario the group could discuss alternatives, how long it might take before rescue arrives, methods of staying warm/dry, and ways to signal for help. It wouldn't take very long before they'd be VERY frustrated and want to stop the scenario.