@ericbrown: I bus there all the time, winter or summer. Here's the employee trick: Take the number 7 to St.Laurent/Blasdell (stop is at St.Laurent/Jeffrey if coming from Rideau). Walk straight down Blasdell, then go on the path across the little foot bridge, keeping as straight towards the parkway as possible, then once the path meets the parkway, turn left. 10 minutes.
If you're happier on pavement, you can also get off at St.Laurent/Hemlock and walk along Hemlock until you reach the bicycle path, then North up that path. ~20 mins.
Enjoy your visit!