Discuss the difference between reflection and refraction and real image and virtual image. Discuss hyperopia and myopia.
I suggest you start by getting a copy of the BSA Fieldbook. It is a much better source for camping and high adventure info than the BSA Handbook or the Camping MB pamphlet. Chapter 8 covers stoves and fuel. Chapter 11 covers all the gear you should take. Including tents, backpacks, clothing and gear lists. You could also spend some time visiting a specialty outdoor retail store such as REI, Eastern Mountain Sports, or a local independent store in your area.
Yes, there are some that were made to only play a certain number of times, they were meant to be non-returnable rentals. I don't know if they still make them that way or not.