Hershey is amazing; if you go, ride Storm Runner, Lightning Racer and Great Bear (those were my favorites at least; ymmv). Ride Skyrush for the credit (but again, ymmv). Dorney is pretty nice; they have a lot of fun coasters like Talon, Thunderhawk, Possessed, Hydra and Steel Force. Meteor is terrifying, but amazing. Hershey's Wild Mouse is better than Dorney's, imo.