Originally Posted by F4Gary
If staying near Amarillo, I highly recommend the Oasis RV park. It is right after Caddilac ranch. There is a Love's truck stop at that exit for fuel.
If staying near Kingman, I highly recommend Blake's Ranch RV Park and Horse Motel...yes, you read that right. Nice RV park.
On your way to Needles, get fuel at the truck stops at exit 9 in AZ just before the Az/Kalifornia state line. It't way cheaper than Needles or for that matter, Kalifornia. We just made the trip to NorCal the last 2 weeks.
For overnites, Tucumcari, Gallup (United RV park) and Holbrook have decent RV parks.
i'd second the recommendation for Oasis as we've stayed there many times.
we've never stayed at the places you mentioned in Tucumcari but we have stayed at Blaze-In-Saddle RV park and found it be a very nice (and inexpensive) stay.
And the OP mentioned traveling I-40. much of the highway in the eastern third of Oklahoma is under construction with the worst part being the sections with concrete dividers on each side of the lane for miles on end and some points seemingly very narrow. we traveled west through OK no less than nine times last year and it wasn't uncommon to see a big truck in front of us hit the wall.