I did two SS1K's before I found about 'wicking' underwear... Boy I wish I'd known ! Well, stand up in the breeze for a few minutes & the problem is taken care of, as long as you aren't using weatherproof (windproof) pants. Get lots of shut-eye beforehand, don't drink coffee early on because you'll have to stop lots, & keep the meals small. Use a small notebook as a log & do a small writeup at all stops, have a safe place to stash all receipts. Write mileage on the back of all the receipts. Carry a couple of writing implements in case you lose one.
Enjoy !