We don't do campfires either. We actually go backpacking vs car camping. If you have the right gear you can stay pretty warm when the temps drop. I know with larger groups it is tough to backpack and not the best for the environment. We just got back from a backcounty skiing trip with a group of friends and there were 2 10 y/o. they pretty much entertained themselves. We had plenty of snow so they built a snow fort and skiing to do. Have fun.