For the north canal, I'd launch at Salsbury Pt. Park just north of the bridge on the east side. They've pulled the docks, though, and it's a bugger in a north wind. The other alternative in the north is to launch on the west side of the bridge at Shine Tidelands. The sign says it's closed, but you can still launch. Not a great launch, but it works when the wind is wrong for the other side.