Hershey is one of those things that doesn't require the extra day, IMO. We went in early February for a comedy show. Without the park open, we basically combed through a few restaurants, the museum (amazing), the Hershey Hotel and the outlets all in about 2 days (midday Thursday to midday Saturday). Not knocking Hershey, as we loved not having any crowds, but it's definitely doable as just one night (vs the three day weekend OP is talking about).