Adventure Caravan and Fantasy Tours both have a good reputation. We did the Grand circle of the western National parks with Adventure. I would not hesitate to do another tour with either company.
Pros: everything is planned for you, camp ground reservations, the more interesting routes, things to see along the routs, etc. We went on some excursions that we would normally not have gone on if alone but turned out to be great memories. Another plus is the comradery of being with a group.
Cons: they travel a little faster than we would normally travel but not to the point of feeling rushed.
They are a little expensive but considering that the prices includes all CG fees, some meals, some excursions, and all of the planning I feel it is worth it.
We will do another one.
Paul, Kathy, and Tux a 4 month Mini Schnauzer
2014 Tiffin Phaeton 42 LH, 2013 Honda CRV
"When the time comes to look back, make sure you'll like what you see"