There's a string of rental properties down on lower thames by the gas station maybe check there. Idk how large they are but they've got multiple full houses so maybe you'll get lucky. Besides that I'd say maybe the hotels in the area like the viking or the one above surf club or the new one that popped up at hammets wharf and just try to get a block deal, a lot of them do it for wedding parties so I'm sure they could do the same for this, plus Thanksgiving tends to be on the slower side for newport because it's more a family kind of thing over traveling so you might get lucky