I spent literally an hour in total diverting from trail to central business districts to buy water at four times during the day.

Granted a bit of that was time out of the saddle and I also picked up a sandwich, and yes, the infamous bag of twizzlers.

Going in a complete different direction I corresponded with someone who rode a century as twenty laps of a five mile route through their neighborhood - monotony would be a killer, but with a cooler in the garage they carried only a tiny water bottle, no food, no gear, and bathroom break options were never in doubt. I preferred the change of scenery but it meant I carried a lot with me I wouldn't have needed.