I've taken two rest days. One was to spend an extra day in Yellowstone. My wife had us touring a good bit so it didn't feel very restful!!

I took a day off in Sioux City.....That day off helped a lot. At this point I'm not sure if I'll take another one. My legs felt very good today..... But my trend has been my legs have felt pretty strong every other day. I've noticed that on past tours I've done as well.