Go early or late but do not go in July/August. These lakes are small and in summer are infested with idiots in boats of all sizes, shapes and descriptions without the slightest understanding of the rules of the road on a
boat. This is cottage country and the boat traffic in summer can be staggering. We kept a boat on the system for 7 years and gave it up for the above reasons, it was safer on the 401 than the TSW. To our thinking, the nicest part is that from Peterborough to G. Bay, especially the Severn. From Trenton to Peterborough it's rather a slog. We currently live about half a mile from Buckhorn Lake and the
noise from boat traffic on that lake has to be heard to be believed. Truly unfortunate because it is a very scenic area and it's a nice trip at the right time of the year.