I've never been to the Oaks show....was thinking about going next weekend. However, it is run by the same people who do the show in Reading and I did go to that one last month. It was a pretty good show. Lots of BP's. Not as big as Hamburg or White Plains...but that is probably an unfair comparison.
To the OP....I have to offer a word of warning about Bills Wonderland of Pets. The ONLY time I bought a live rat from there, it infested my BP with mites. I am not gonna bash them....maybe it was only a freak occurence, but I felt that I must warn you about my experience. On the other hand, I have bought live rats from Precious Pets in Somerdale several times with no problems.
BTW....Precious Pets usually gets their live feeder shipments in on Thursdays, so if you go on a Thursday afternoon you will probably be able to find what you are looking for. Its not overly far from Berlin either. Good luck sir.