Hi, I realise that most people head to the Niagara region for wineries in Ontario but if you are visiting Toronto and places east - say if you are popping over from New York then I can really recommend the Waupoos Winery http://www.waupooswinery.com/ on the island of Prince Edward County - note this is not Prince Edward Island which is a province and something else entirely. I believe there are bus tours from Toronto that stop there too.I am pretty sure they go to many of the wineries on the island but if you are going to spend your money on food, then this is the place I would recommend.
Nearby Marriotts - there is a Fairfield Inn in Belleville. I understand that there will soon be a new Residence Inn in Kingston.
We had a great lunch there today and the menu is big city quality. The food is VERY well presented, it is innovative, the setting is excellent, the staff attentive and charming.