We talked about this trip with friends yesterday and I think we just picked up a few more couples My weekend searching tells me that H.O.G. offers fly and ride locations at Boise, Idaho, Salt Lake City and Las Vegas. These seem like the best options for most of the parks but they all have at least one park that's a long distance away - either Glacier or the Grand Canyon. That's a big area out there !
We have done the fly and ride in Vegas. LV HD is great on the rentals. I don't think that I will ever get tired of the grand canyon. Last January we did a trip to Vegas and did a route through death valley, Scotties Castle and back to Vegas....by car. Death Valley was actually cold! The views were breathtaking. I want to do it on a scoot. Miles and Miles without meeting a single car! I forget the name, but there is a small motel/gas somewhere in mid trip and I would say to stay there to give time for "exploring" and enjoying the ride. I have the gps on it stored somewhere.
One for my bucket is Yellowstone, grand Tetons and SD. I'm ready!!!
I wonder what it would cost to ship a bike there and back? I have the same time issues that you seem to have.
Bill