Speaking of backpacks, CamelBaks, jersey pockets and sweaty backs, anything that can't get wet better be in something waterproof if it is going in a jersey pocket. That folded up cue sheet is one example. There's always a chance that your GPS phone/electronic device will die and leave you with no direction out in the middle of BF--------(fill in the blank) It happened to me one time on a century in mid/late August in the sweltering heat/humidity of VA. I ended up doing 155 miles before I finally got back to the start/finish line. You can never have too much water capacity. I was stopping and filling up my bottles at rural churches at their outdoor faucets. I was at this rural school getting my bearings when the phone died. I took off hoping I was headed in the right direction only to end up back at that same f-n school about an hour later. Very demoralizing, to say the least.