I can't really think of thing to do in the Harrisburg area. I'm about an hout and a half north od it. There are quite a bit of hotels near the Hershey area although they will most likely be higher priced since it's a huege tourist area. My best sugestion to you is to ask employees at Hersheypark. Also Knoebels is ONLY an hour and fifteen minutes north of Hershey. Since you are so close I would consider it a MUST DO. I think it's one of the greatest traditional parks in the U.S.
Also if your headding west Knoebels is only about 20 minutes from I-80. It is also pay per ride so you could ride Twister and the Phoenix for only $3.50!!!
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Parks hit for 2000!
PKD,BGW,Knoebels,DP,HP,PKI,HW,SFKK,SFA, Camden, SFO,CP,WL,IW,KW,BP