I second the vote for Doe Lake camp (near Huntsville). It is a Girl Guide camp but you do not have to be a Girl Guide member to attend. Lots of outdoor activities and they have a great beach and waterfront program with canoeing, kayaking and sailing or sailboarding (depending on the age of the campers). Also land based activities including camping skills, high ropes and low ropes courses and a climbing wall as well as crafts, nature activities and outdoor games. All staff is trained for an entire week before camp starts and have completed First Aid training and Risk awareness training. I know that when my kids go to this camp that they will be safe and well looked after. Look on-line on the website for Ontario Girl Guides for information on all the different programs and dates. My kids are going again this year for the 9th year and they still love it. There are also camps in Haliburton (Camp Adelaide), Ottawa ( Camp Woolsey) and Clifford (Camp Wyoka), Ontario. I think Clifford is closer to Southern Ontario since it is near Kitchener. I've never been to Camp Wyoka but since my kids have been to all the other Girl Guide camps I'm sure it is just as good.