Quick/Mini-trip report on my YNP/GTNP trip this past week:
Hotels:
(a) General for YNP hotels: no AC, most had fans, older ones had creaky floors (better to be on top floor) and very limited outlets. Consider eyemask if you may want to sleep with windows open to cool down room. All Xanterra managed.
(b) Lake Yellowstone Hotel/Sandpiper: Typical for its age. Definitely creaky floors and limited outlets (I had to unplug a lamp and use its outlet). My room was noticeably smaller than the picture shows for a standard Sandpiper room, but no other real surprises.
(c) Old Faithful Snow Lodge: Fairly new hotel in OF area. Room was comfortable, relatively spacious.
(d) Grant Village Lodge (Fox Lodge): Below average. Felt like a well used motel room or maybe a large dorm room (though it was clean). Bathroom was tight, and I suspect doorway was smaller than standard 30".
(e) Togwotee Lodge (not YNP, about 15 miles east of GTNP): Good lodge room, comfortable. Somewhat of a creaky floor. Highway down to GTNP was usually pretty empty. No AC in my room (some have it). Managed by Aramark.

Dining:
(a) Most of the food at Xanterra properties was pretty average. The dinner buffet at Old Faithful Inn was below average. The dinner I had at Old Faithful Snow Lodge was very good, but the breakfast buffet was weak. Also in the average category: Grant Village Dining Room and Lake Lodge Cafeteria.
(b) Dinner at Togwotee was good. Breakfast buffet was average (not able to order off the menu since only offering buffet).
(c) Breakfast buffet at Jackson Lake Lodge Mural Room was good but a little pricey.

Feel free to PM if you have specific questions on above or on day hikes, etc.

TRRed