You can expect to be busy! The Inn dining room is huge with lots of people working every shift. The geyser will rule the rythm of your workday. The Inn is gorgeous, though; if you're going to work in Yellowstone you must do a summer at OFI, if only for its history and mind-blowing architecture. You'll love it. The dorms vary. I don't know how old you are but a lot of younger employees end up in Laurel, which has shared bathrooms down the hall. The nicest dorm is Larkspur, which is much quieter, usually for older or returning employees; you and your roomate would have your own BR there. I think the same is true of both Bitterroot and Lupine--at most you would share one bathroom with one other room of two girls. All the dorms are pretty decent, I think, except Laurel, which is a hole, but the young, social, party-hard crowd seems to thrive there. I'm working at Yellowstone Lake this summer but the Inn was my first YNP experience--it's a pretty special place, geologically speaking there's nowhere like it in the world. Good luck and let me know if I can answer any more questions for you.