Grundy Lake Provincial Park in Ontario, Canada is a good place to camp with your dog. Except for the beaches, you can take your leashed dog everywhere in the park, and there is a waterfront leash-free pet exercise area. The pet area, adjacent to a parking lot and boat launch, is not the prettiest part of the park, but it does offer a lovely view across the lake, and Milo didn’t seem to notice the aesthetic drawbacks.
Probably due to the convenient parking, this pet exercise area gets used. Every time Milo the AwesomeDog and I showed up we met one or two other dogs. Since people tended to keep a close eye on their dogs I felt comfortable letting Milo enjoy this swimming spot.
Although when one woman did show up with five kids and two big dogs, Milo and I beat a quick retreat. That just seemed like a disaster waiting to happen. Overall though, Milo spent enough time swimming to tucker him out, which is really the point.