I'm in ohio and its 2.5 hours to the steele city show for me and I always enjoy it. I goto it more often than the ohio shows because I think it is a better expo. Not sure where u are in PA but the Harmar House show is also excellent! Its a smaller show but I think i've always gotten better deals there. as for picking up feeder worms i get them when i'm there but for the most part i order online. plenty of places to choose from.
btw if you look at the website and pre-register first time visitors get in free to the steele city show. also check out the list of vendors and their websites maybe talk to them before the show and they will bring what you want and set it aside for you so theres no fear of going home empty handed.