Cool. It's on HW 148, take Avoca exit on HW 50, and continue east for a couple kilometers til you see cars with kayaks on your left hand side... Unless you're the first one to arrive, in which case good luck finding it... Hint: the Rouge empties into the Ottawa, and there is only one bridge where HW 148 crosses the Rouge, and on the east side of that bridge is the meeting place. Cheers!
--C.