Thanks for more great advice, and sorry about starting a new thread -- rules for every forum are different!

Because we are new to road tripping such long distances, and want to leave time and space to be spontaneous, we decided to not make reservations in the National Parks. We will try and get walk in sites, if so, just eating the cost of the cancelled sites in some cases. And yes, I agree the booking fees are exorbitant! Another reason why I'm hoping that we can find non-reservable sites for most of the trip. I was just concerned about Utah as the Nat. Parks there are so popular. I am less concerned as we get into Oregon, and we made reservations in the CA state parks.

Thanks again for your help!