I think the $15.00 drive thru light show was worth it. Our jaws dropped when we first heard the price, but we ended up enjoying it and it was worth the money. It takes a long time to drive thru 2 miles slowly and we had my elderly MIL w/ us and she can't walk too far. So the car ride was perfect for 2 small children and grandma. You can't walk thru that one, just drive. You can walk thru the park which is called Candy Lane and see the lights which are pretty nice as well. But the drive one is across the road from the park in the hotel direction. It's not Osborne, but it's worth it if you can't get to WDW.
The park itself has most of it's rides open, except the water rides. I rode the roller coasters in October and December sometimes. If you have kids that will be riding a lot of rides, paying for each one w/ a 2 to 5 tickets gets expensive. We rack up $40 per kid quickly and ours our little. I would buy the bracelet which gives them unlimited riding w/o having to waste time going to each window to but 20, then finding yourself there again to buy another 20 in an hour. That is a waste of time and money unless you only plan on going on 5 or less rides.
We also enjoy the hotel very much. Sunday Brunch is wonderful in the circular dining room, but it is somewhat expensive (although worth the money) and men must wear jackets. Small children are welcome. We took the family for Baby girls' Baptism and the nephews enjoyed the atmosphere and they didn't charge us for a 7 yr old even though we told them his right age. They also have wonderful chocolate themed entrees which I hear are marvelous.
The Fountain Cafe at the Hershey Hotel is lovely for casual dining. We usually eat on the patio outside overlooking the mountains, but in December that won't be an option. But it is still less formal inside for kids.
There is also a spa at the hotel which I hear is nice.
There are the Hershey Outlets for shopping. There is Founder's Hall which is a nondenominational church which is lovely and a nice tour. I have also seen Sight and Sound and it is very nice.
That's about all I know for that season. Have fun!!