Also, something that I left out previously, don't forget to stretch. Do a full set of stretching exercises before the ride (at least 10 minutes) and every time you stop at a SAG station, do some stretching when you get off the bike and then again when you are ready to head out. When you are done, do another 10 minute routine.
If you are going to spend the night at a motel at the end of the ride, take a hot shower and when you are done, let the hot water run on your legs for about 4-5 minutes or until the hot water runs out. The hot water will cause the muscle tissue to relax and keep your legs from cramping or feeling like jelly. Between the hot shower and the stretching, your legs will feel as if though they were never on a bike the next morning. I do this on all my long rides with overnight stays and it works wonders.
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HCFR Cycling Team
Ride Safe ... Ride Hard ... Ride Daily
2017 Colnago C-RS
2012 Colnago Ace
2010 Giant Cypress