Thanks, your reply is encouraging! We wont be doing Grand Canyon, Bryce or Zion, already been there! so that will give me more time for Yellowstone, a childhood dream. My Grandmother went there in 1910 by train as far as the train went then took a covered wagon the rest of the way. She kept a journal and I must have read it a million times when iIwas a child, so hope to spend at least 3 days there.
Gwilda