You need to get down to Baltimore and out to Pittsburgh. Then take a few plane fights. AT&T Park, Kaufman Stadium and Miller Park are beautiful. Cleveland is pretty nice as well.
I'm embarrassed that I haven't been to Camden yet. I've been to Kaufman years ago (before their OF bleacher renovations) and it was beautiful. Really love the sports complex concept in KC. Petco Park in San Diego is my 3rd favorite. It's still the only sports venue where I've been able to drink a Grand Marnier while watching a game (top floor warehouse bar down the LF line). Also Citizens Bank in Philly was really nice. Cheesesteaks and baseball = can't beat that!
Baltimore, Pitt, SF are all on the bucket list. I went to old County Stadium in Milwaukee and lived out there while Miller was being built. Place is huge! Never been there for a game though. Would like to do a midwest tour and hit the parks I missed when I lived out there: Busch, Target, and Miller.
My least favorite, by far, is the Trop. Even worse than old Shea Stadium. HORRENDOUS atmosphere. But I'll always have a soft spot for that stadium thanks to Khalid El Amin and our '99 champs!