Stay downtown at the new Marriot, avoid the Adams Mark. That used to be the high end hotel downtown, but not anymore. You're only here a short time, so Uber is probably better than dealing with a rental car. You can Uber up to Niagara Falls on the American side, then walk over the Rainbow Bridge to the Canadian side (with your passport obviously). If you want to eat at the 716 restaurant, do call ahead seating. We made the mistake of not doing that and it was the night before a game, two hours we were told to get a seat.