Good post!

The summer heat in Phoenix puts me in a similar situation. I leave my CamelBack PSK at home because the heat will ruin the contents. The rest of the year I keep it in my car. I do have some pocket PSK items.

I keep water, tools, jumper cables, a first-aid kit, and a loaded G27 in my SUV. I have first-aid, fire, shelter, water, compass, and signaling gear. I had some snack bars but the heat got to them. The heat also dries out the band-aids and first-aid items.