My parents would like to spend to spend one night in Yellowstone on 9/3 before joining us at a cabin for 5 nights in Irwin, ID. They plan to leave their home in Smithfield, Utah very early on 9/3, stay in a cabin at Lake Hotel on 9/3 and make their way to Irwin before dark on 9/4. This is their first visit.
My initial thoughts are that they should come in through West Yellowstone and see the geyser basins on 9/3 and then head up to Canyon area morning of 9/4 heading out South gate through Grand Tetons to Irwin in the afternoon. Does that sound reasonable?
(We know Irwin is not a good base for GTNP or YNP. Our plan for the Irwin leg of the trip is to visit with family not sightsee. Our own family will be spending 6 nights in park lodging before the cabin time.)