Thanks for all the info! Yes ... the Gardiner entrance is where we expected to enter. We stayed in Gardiner a few times and have always wanted to stay at Chico Hot Springs Resort but never made it. My wife has been to Yellowstone / Grand Tetons at least one a year for the past 10+ years. I have been about 7 times. But we have never gone in winter. Well ... she has once about 12 years back with 2 girl friends. We assume most of the park roads are shut down. Thanks for all the great info.
One question ... if I do drive .... based on the comments I assume to head home my only option would be back to Bozeman and then on I-90 east?