Anybody use them when hunting with a few other guys? And I don't mean to locate game, make stalks, etc. What I mean is if a couple of you all go your separate ways in the morning and be able to communicate with each other if you need to once in awhile. I'm going to CO soon with my brother in law and thought it might be nice to be able to stay in touch with him throughout the day. Maybe plan on checking in with each other at noon each day or something like that. I'm not sure how far they'll work in the mountains though either. Just curious.