That sounds so fun and what a gorgeous part of the country. I've been a bike tour guide before but full blown out panniers on all the bikes and camping gear. Since I was the leader, I carried almost every tool to take apart a bike. But nothing major happened. If you are having support or equipment meeting you at your destinations, just have a spare of just about anything since they will be in a car. Things like spare stems, spare crank, spare wheels, lots of inner tubes. Anything like that. It don't cost anything to have that spare in the trunk of someone's car.
Have fun!