For a solar charger I'd recommend Goal Zero.

If you're standardizing on AA batteries, I'd recommend Eneloop for rechargeable and Energizer Ultimate Lithium for primary batteries. They last a real long time in storage; ideal, IMO, for kits.

Handheld FRS and GMRS radios won't have great range no matter what you do. Don't bother with GMRS unless you're going to pony up $90 for the license. Motorola makes good ones, just make sure they have PL code capability (most do) and work with the batteries you're stocking.