Chateaugay

Diddle diddle is a great park and huck section. Super easy to get there by car, park and get the most out of it with friends.
We use to park on the side of the road (https://goo.gl/maps/mX6UR3XDy2C2).
Please get in and out of the river by river left. Lokks like a lot of people go to this section (fishermen, kayakers, etc). There's already path made. River right have private property.

We have done this section several times at around 30 cms on Huntingdon Hydro Quebec gauge. I would recommend it a bit lower (not lower than 25cms).
54 cms in 2011 (see RadPat comment) was great and real fast. Let's share your experiences!!!