I think you'd be fine with a power drifter for the rivers you mentioned. Those rivers really don't require a whole lot of maneuvering with the oars...as long as you can hold a line you could row the power drifter just fine. The jet would also serve you well on those rivers. I would shop for a light boat though to make rowing as easy as possible.
I've been working those rivers with a standard 16' foot Clackacraft
for many years, with a 6hp kicker. This setup isn't nearly as fast as power drifters or other motor boats.....but is super easy to row and drift.