Great adviseAt your stops in the desert ice down the front and back of your shirt is a nice break from the scorching heat. It'll get you about 50 miles if refreshment going down the road.
I have put ice in my helmet at stops as well.
Be prepared for all 4 seasons.
Pack all your gear in dry bags.
Sunscreen and chapstick.
Pocket snacks. Healthy choices.
Knife and a lighter.
Water and a filtration method.
Be ready to change course if cool stuff is discovered. Don't lock yourself into plans.
Being on the road is about having fun. Always sticking to a set and rigid schedule sucks, a lot.