Thanks for the help Attila and others,
I swung by Kortright yesterday (it took me forever to bike from the end of the subway line) but it was well worth it. I heard the peepers and managed to actually find and see one which is what I was hoping for. Also saw the wood frogs in a big mating 'ball' all jumping on top of each other and surrounded by huge clouds of black eggs. It was pretty amazing. It was my first time at Kortright and I really liked it. I also saw two birds that I thought were unusual this early, northern waterthrush and a black and white warbler, but I am quite sure about both. There were wood ducks around as well, deer, coyote scat (and unfortunately a road killed coyote near the entrance), butterflies including an abundance of comptons tortoiseshells and mourning cloaks, and some wildflowers.
Really a great trip for me!
Thanks again,
-Andrew