We have PS for LTT, and they took a cc# so if we no-show or don't cancel 48 hrs in advance they'll charge us $10pp. I would suggest that she check for cancellations 2 and 3 days in advance, because most people aren't going to be willing to forfeit their deposit. If that doesn't work for her, it certainly doesn't hurt to try a walk-up. The PS for LTT were completely booked for Thanksgiving in the first 40 min. the phones were open, though. There will be competition for walk-ups as well. I'd make plans for dinner elsewhere. I think the odds are too slim to waste time searching for a place for Thanksgiving.