We had the ice cream from the Golden Nugget as well... sooo good, and you get ALOT of icecream for 4$.Sounds like a good day. We always finish with the dipped cone from the Golden Nugget with the peanuts on the outside.
I figured with 12 hours there would be multiple turns on the rides. I love Kennywood, but you can get through it pretty quickly.
Food wise it went....
Potato Patch fries with bacon/cheddar cheese to start the day
The chocolate dipped cone with sprinkles for a mid day snack
Funnel Cake with ice cream/strawberries/whipped cream
The souvenir cup for 10$ paid for itself too as we refilled probably 6 or 7 times throughout the day with the 99 cents refill and you can bring it back with you if you come back and get the same cheap refills. We got kennywood passes for Christmas so we don't pay to get in the park at all either which is also nice.