Love Grand Teton. So beautiful. Yellowstone is pretty too. And since you are there mind as well go to Glacier NP. Visit some of the glaciers before they are all gone. Rent a boat there while there and watch trout swimming in the lake. Something my family did about 45 years ago.

There used to be lot of U-pick orchards nearby or on the way and the fruit were all very juicy and delicious. Can't beat tree ripened fruit (except pear. Pear gets mealy if left to ripen on tree).

Wow!! Enjoy your stay in Yellowstone. Been there number of times but not yet in winter time.