We have avoided Algonquin Park for a couple of decades, since it always appeared to be crowded in the months of July and August. Due to a shorter than usual time frame, it seemed to be the best option. Drive time from Guelph plus on the water time was going to be about 5 days (Sept. 12 - 16).
As well, we had heard that the Barron Canyon Route was a good one to take in September.
Our intention was to put in at the Achray campground and pull out at Squirrel Rapids. Our vehicle would be shuttled to Squirrel to meet us by Algonquin Portage (located on the Barron Canyon Road).