Very cool. The Buffalo Boat was unique in its day. I built the first one back in 1982 I think. Most of the square ended boats built now are a bit longer and flatter.
I'm trying to get an old one back. I have a friend who owns one of the first BB boats I ever built. And he never uses it now. I'd like to get it back so I can deck it. And turn it into a small two person white water boat. For that purpose I'd leave it fully rockered.
For day trip fly fishing a slightly flatter bottom would be better. Like what you are doing.