Eric .. on long unsupported rides and Sebring this year ...
On long rides through known but desolate territory I do sometimes drive the route and leave water at stragetic locations. It proved to be a real lifesaver once.
As I got to the turnaround point of a long and hilly training ride I discovered that the water bladder in my bag was almost empty. Somewhere along the way the tube from the bladder to the bite valve got nicked by the spokes and there was a small hole. The water was slowly draining out of the bladder.
I have about 9 twelve inch strips of electrical tape taped to the seat under the pad so I used a piece of one to wrap around and plug the leak. I filled my water bladder with two bottles of stashed water and drank another bottle on the spot. The temp on my Garmin recorded 113F. Eighty-eight miles and 8,800 feet of climbing.
When on long unsupported trips I typically carry:
• 3 tubes;
• 1 tire (folded and ziptied behind and under the seat);
• 4 CO2 cartridges and valve release;
• 1 small micro handpump;
• 1 foilwrap emergency blanket (cold);
• 1 pair of finger gloves / lobster gloves (dep on how cold it is);
• Maybe some chemical toe and finger warmers;
• 1 pair of armwarmers;
• 1 micro rain coat;
• toilet paper;
• small plastic bags;
• tire levers;
• master chain links;
• various little tools.
Cellphones are useless 95% of the time due to lack of coverage.
Tomorrow morning it's supposed to be in the teens up here but probably in the 30's to low 40's down the other side of the mountain. The plan is to drive to the other side of the mountain and do 18 miles down and 18 miles up about 3 - 4 times, (6,000 - 8,000 ft of climbing) depending on when I get a start (daylight).
I wear insulated socks, Mtn bike shoes (spd), merino wool longjohns, regular cycling shorts over that, external catheter, merino wool long sleeve jersey, merino wool cycling jersey over that, arm warmers (the best are long woolen socks with the toes cut off ... the inside out), a bright yellow wind breaker, a separate set of `arm wings' of the same material as the windbreaker, small skull cap.
Sometimes I'll put a pair of long, lightweight poofy pants in the bag that have never failed me, even in the windiest, wettest weather.
Given the 3-season weather around here in the Fall, Winter and Spring I'm often taking off and putting on clothes, depending on the weather and situation.
I run no-name wheels with Conti Gatorskins with tire liners. The 87 and 7 mile lap will have all the repair gear described above in the seatbag.
I'll use two bladders with tubes coming out either side of the bag. The first bladder (80 oz) will hold water. The other bladder (48 oz) will hold a maltodextrin and whey protein mixture that I've used for years. Fairly dense but it holds about 1500 calories. I can ride for several hours without having to be concerned about water or fuel. I carry electrolyte pills and caffeine pills in a little plastic bottle. I doubt it but I may have a stash of peanut butter and bread pockets on the closed course.
When I get to the closed course section of Sebring I'll pitch most of the stuff in the seatbag, except for the fuel and water. I'll pop a regular DF seatbag with just tire levers, a CO2 cartridge and a tube into the seatbag. Much lighter. I'll also get rid of the spare tire zip tied to the seat.
Since I'm riding self-support I'll stop to fill the bladders with water and premixed fuel when needed. The two days preceding the race I'll be on a liquid diet. I'll stop ingesting caffeine 2 - 3 weeks before the race so that the caffeine pills have more punch, if I need them.
I hope this is helpful to you.