danimal53 wrote:
maybe just wishful thinking, but does the traffic/drive time up to Yellowstone get any better being somewhat late in the season? i think we're definitely leaning towards Grand Tetons, kind of works better for the rest of our trip anyway.
Yellowstone is big...
From Coulter Bay to Mammoth is about 115 miles (each-way, though other areas are closer) on roads with low speed limits, animal jams, construction delays, and traffic. Traffic should be better after Labor Day, and the construction schedule varies by year so you may catch a break there too, but the speed limits don't change and animal jams are a dice roll.
If you want to tour Yellowstone and you must have hookups I'd bite the bullet and stay at fishing bridge. You'd save enough drive time in 2-3 days of touring to essentially give you an "extra" day worth of time. The Tetons are also great so I wouldn't try to talk you out of stopping there too before or after Yellowstone.