Firstly, I see you are visiting from FL and I assume you are flying to YYZ. Secondly, if so, I strongly recommend you rent a vehicle at YYZ if you don't wish to prepare meals internally or on the outside BBQs. A rental car would be very beneficial to visit restaurants & attractions in Horseshoe Valley, Wasaga Beach, Midland, Orillia (Casino & Mariposa Market) and Barrie, especially in the summer time.
The closest grocery store is in Craighurst, about 2 -3 miles away. (outside BBQs are very good) The front desk may be able to arrange a trip to the grocery store when you arrive.