OK after much deliberation I have booked the car for the cross country road trip. I started looking at loops and soon saw that any decent radius loop starts to hit milages similar to the cross country run. Also due to me finishing Friday lunch I can get a good start on the Friday if I can jump straight in the car. Flying to the west coast would have taken all day and I would have arrived late evening - not the best time to start the adventure.
Rental is _really_ expensive but since work has paid for my fight to the US and I only need motel+food+gas on top of the rental+flight back for SanF to NY I can justify the outlay.
I got a couple of AT&T go-phone sims off ebay recently one for my ipad one for a phone that I have yet to source (my old gsm handsets are only dual band). I really don't want to do this without a cell phone, fingers crossed I can activate the sims. Maps and GPS I also have to sort out.
I am going to pin down the route in great detail, but remain flexible about where to stop. Ideally I would like to do the the first 50% quicker as I think I am going to be more wowed by the second half of the journey more.
Worst case scenario is I don't make it, have to drop the car off somewhere else and pay for another flight back to NY in time for my journey back to the UK.
I am a little bit apprehensive. I am sure 25 years ago I would have done thing like this without a second thought!
Thanks for being so helpful.