We're doing a 70 mile training ride this weekend, and I was thinking about taking a fannypack or light backpack to carry a couple of sandwiches in for a lunch stop (rawther than payin' $5 for a sandwich at the convenience store - i so cheap.) I was worrying that it might cause or exacerbate current back issues.

It's good to read that other teers use packs... maybe I'll just put them in the fannypack, though... that should be big enough.