First off welcome to the forum both scout doors and javelin5. There will be a lot of suggestions from people more qualified at rescue than my self, but the idea behind the hike is to have fun, and to teach your scout about the outdoors. Have fun on your hike, with the SPOT you are way more prepared than 99% of the people who head for the hills. Take the normal precautions and teach the scouts how to enjoy there surroundings. Javelin5’s suggestion of brushing up on survival skills is a great idea you can also develop ideas to improvise ways of using your normal equipment on hand to address matters of transport and lifting injured hikers. Since you have multiple extraction sites then I would have my master kit with a larger FAK and heavier equipment in a vehicle designated to respond to your SPOT. If the situation requires special equipment then calling SAR would probably be in your best interest anyway. If you start trying to carry everything for every contingency there will be so much weight that if you can carry the load you and those designated to help you will be miserable and you will not accomplish your main goal of having a good time.