Barrel is probably more of a class 4+ run right now. You will put in on Lower Death, at the dam right below a manky section. It is runnable, if your up to it. Barrel itself is pretty mellow, you can scout it all on river right on the bike path. All the moves are very visible...
South comes in at like 2800-3400ish, depends on the hull speed of your boat i guess. You can spin, blunt, pan-am, helix, donkey flip, whateva you want, its just not super retentive..
See ya on the river