I usually bring 2 guitars and 1 amp, but I also bring back up tubes, back up cables, back up power chords, extra string sets and always have a pocket full of picks. I also keep a multi-screwdriver, flash light and wire cutter in the bag. I've broken strings and had to use the flashlight, but never more than that. Sometimes I wonder if I bring too much. One of these days I might just buy a Quilter 101 reverb and just use that as a backup amp and not bring the extra tubes and amp-wares. I can still make it from the car in 1 trip. That is sorta important to me. How 'bout you? Do you just bring the things that get used, or do you bring along the backup supplies?