Got the hull sides done tonight, and earlier in the weekend I did some detailing inside the cabin (basic panelling on the walls, a doorframe, not much more).
Each hull side is a single strip of .020" styrene plastic card; to work around the curve and slight outward flare of the hull I cut the bow end of each strip wider than it needed to be, and flared out toward the bow. After glue it down, each strip was easily carved and sanded back to the proper deck line. I'll be cleaning all the seams and edges up with putty, as well.
The boat standing on it's stern, one hull side glued down to the bow but not trimmed, the other hull side glued at the stern & cabin.

The stern quarter view.

Finally, another bow quarter view with the hull sides in place.

It's detailing and cleanup from here on, although I want to beef up the roof/flying bridge a bit and possibly the cabin walls, and the bow deck might wind up with another layer of plastic card laminated to it, as the current layer is pretty thin.