They had to have driven back to Toronto, dumped the cars there someplace. There's the train, and I'm not sure they could have arrived as quickly as they did. IMO, even a small charter would take longer???
Stratford had the theatre task, Rheo Candy task, Paddleboat.
Could be a KOR, but that's not their style. They usually film those on separate days. Even S4 Hamilton to Kingston.