2gypsies wrote:
The first two to three weeks of September is ideal for Glacier and Yellowstone/Grand Tetons. We've always had good fall weather - cool nights/mornings, warming up nicely during the day.
Heading south from there the southern Utah parks are great through October. Bryce is the highest elevation so it'll be cooler than the others.
Sounds like a nice trip in our favorite parts of the country! Enjoy.
I agree with this. Do be prepared for a cold snap with extra bedding, etc. At worst you could get stuck for a couple of days waiting for roads to clear up. So have plenty of supplies on hand.