Any float in the canyon will be easily manageable in a raft even if you haven't rowed moving water. There will probably be 5,000 people out there this weekend though so watch out for that. More than once I've been sitting on anchor in my drift boat and had the booze-cruisers run into me, pretty sketchy in a hard boat with an anchor down... My buddies and I fish that river almost every weekend, but we are heading down to the D this weekend instead. Maybe next time we could link up, have a rowing crash course, and catch some fish.