Oh no, don't skip Grand Teton. It would be a shame. I believe the scenery is much more grand than Yellowstone, but nowhere near the features. However, you can take a boat ride on Jackson Lake and get right up next to Mount Moran at its base and look straight up about 6,000 feet. Even take a lunch or dinner cruise and eat in the shadow, kinda, of Mount Moran. Then, go to Jenny Lake, take the tour boat and take in Hidden Falls and Inspiration Point. Then on over to Moose Junction to the Craig Thomas Visitor Center, then to the Gros Ventre area and Slide Lake. Back around through Antelope Flats and hundreds of Bison/Buffalo for us hicks, and driving around you might see some Grizzly Bears, Moose, Elk, Deer, Antelope and all kinds of birds, including Bald Eagles. Then one night, get in your car and go into Jackson and over towards Teton Village and take in the Bar J Wranglers. Very nice dinner and a two or so hour show of great western music, think Sons of the Pioneers, Roy Rogers, etc. and they feed about 600 people in 20 minutes prior to the show. Jackson is about 45 minutes from Colter Bay and you get another chance to see wildlife as well as driving along the Teton range and seeing those majestic mountains. Grand Teton is not a park to miss. Or if you don't want to drive into Jackson, go to Leeks Marina and have a great pizza with beer out on their deck overlooking Jackson Lake. We have spent the last 10 -15 anniversaries on that same deck and it never gets old, even though I am.
But then, I am biased, I have been going there for over 50 years and go back about three weeks each year to fish and sightsee.
John A. Lichty