Just a heads-up for all you Hersheyparkers that may come visiting this year... Your single day admission is catching up to that of WDW, slowly but surely.
Admission price is at or a little above $60 for a single adult. Parking is $14.
Your best bet is to find one of the Giant grocery stores in the area, there's one on Rt. 743 and another on Rt 39, both are within 5 miles of the park, and you can get discount tickets. A single discount ticket will take off $16, so it is $44. They have a special right now that if you get 2 discount tickets, they'll throw in free parking as well.
So hit up a Giant on your way in or when you get to town and save yourself some serious money. Also, if you're coming in from a distance, if you get in late enough, they do have twilight packages where you only pay like half admission to get into the park after certain hours (depends on when the park closes). If you want to kinda scope out the place ahead of time.