Coming from out-of-town, I have to say that I liked GAB better then Camden Yards.
Camden's neighborhood is nothing to speak of, either. The "buildings" that it looks out onto are a few hotels. The warehouse is a nice touch (and beats out the smokestacks by a longshot), but it was wall-to-wall people down that street...very difficult to get to vendors. And the concourse inside the park was a bit narrow. It's much easier to get around GAB.
The hotels in downtown Cincy were better and lower priced then the hotels in downtown Baltimore. I've heard that it's better to stay on the Kentucky side, anyway -- which I may try next time I travel to Cincinnati.