You can take a coach or train to Niagara and do it in a day. No need to stay the night unless you want to go out on the town (which I wouldn't recommend).
As others have said, Niagara on the Lake is very nice; there are lots of wineries in the area and some hiking trails too.
If you want to...
Mitoma and March would presumably be the first choice wingers, with Adingra, Osman and Minteh as the competition/backups.
Sarmiento and/or Buonanotte loaned out.