This summer my 14 year old will be going on a week long backpacking trip. My two biggest concerns are keeping his insulin cool and keeping his pump and dexcom charged. I suppose he could go without dexcom, but it's hiking all day for a week...just the kind of thing dexcom is especially useful for. 1) frio pouches...there are many of them and I don't know which size he needs. Do you think I also need one to put his pump inside, or just for insulin? There will be water at camping sites so he could keep it in the water for night, but not during the day. Has anyone ever tried making their own frio type thing? I know you can buy the crystals, and I'm pretty handy with a sewing machine, but maybe it wouldn't be worth the trouble.... 2) has anyone used a portable charger they would recommend? There are solar chargers and battery powered devices. Any thoughts on which is better? I'm not wanting to spend a fortune on this, plus size is a consideration. Any other advice on best ways to care for diabetes on a backpacking trip? We haven't done a lot of this kind of thing...he goes camping fairly often, but only for a night. Having him gone for a whole week is making me a little nervous. Thanks!