JMU, I hear the Brooklyn park is like minor league heaven. If you ever have a chance to see the Lake Monsters there, could be really fun. The Aberdeen Ironbirds are on my list as well.
Good luck with all that. Supposedly, there's a years-long waiting list for Ironbirds tix. I guess you can find scalpers and whatnot, but expect to pay way more than anyone reasonably should to see short-season A ball.