Thanks to everyone who replied to my post about 3 weeks in the west, starting in Yellowstone and travelling south to the Grand Canyon, taking in several national parks on the way.
We have had to change our plans and can't fly to the States till the 3rd week in September, staying till mid-October. We were thinking that it might be getting rather cold in Yellowstone/Grand Teton. We don't have very hot summers here in Britain and would dearly like to experience some sun and warmth. So we are thinking of flying to Las Vegas (or Flagstaff?Salt Lake City?), doing a circular route seeing Grand Canyon, Zion, Bryce, Arches, Monument Valley etc. and then heading for a final week in San Diego. Is this realistic? We do like to swim and were looking forward to Jenny Lake or other lakes in the north, but it would be too cold for swimming up there then, wouldn't it? Is there any lake or other place anyone could recommend in Southern Utah/ Northern Arizona? Or should we just save the swimming till we get to California?
Any suggestions for a 3 week itinerary or places to see along this route would be very welcome. I have saved the recommendations that you all posted before.