Update:
I want to thank everyone for their thoughts and suggestions.
We stayed almost the limit at Ten-X camp in Tusayan near the Grand Canyon. Then we headed up 89 through Page, AZ to Bryce as it was the only one of the National Parks in southern Utah cool enough to visit. We will catch the others on our way south. We had a great boondocking location in the Dixie National Forest near Bryce.
We then headed north on 89 blowing through the heat of Utah as quickly as we could, staying a night at each of a few commercial campgrounds with electricity so we could run the A/C.
We circumvented Salt Lake by heading around it to the east passing through Heber City before cutting NW to Ogden and heading N to Ketchum ID where we are now staying in a Forest Service campground and really enjoying the fabulous weather, beautiful surroundings, bicycling and hiking. We also visited the Ernest Hemingway Memorial and his gravesite. Groceries are pricey here but our campsite is just $8 a night with our senior pass. Even the most expensive diesel is way less than in CA.
From here we will head N through Challis and Salmon, ID, and Missoula, MT up to the Mullan, ID area where we will bicycle the Hiawatha Trail before heading south to southern Utah when the weather has cooled off a little. We haven't decided on the routing south yet. We may come back this way or head through Wyoming and Colorado. We'll see.
Thanks again!
