Make sure to bring a small bag! Don't bring your entire backpack and carry everything around the park. Bring something like a small string bag, purse, mini bag, etc.
Bring lots of water! Parks especially in the summer can get very hot and places like Hershey Park do not have a ton of shade. Knoebels has lots of trees, but there are long lines just to get bottles of water.
Do not bring a ton of money! Bring small quantities of money. It doesn't necessarily mean you can't bring a lot of money, just make sure you're only paying in ones and tens most of the time.(Everybody who's going to Hershey Park just remember Hershey does not take cash they only take cards you can get a debit at the front at a kiosk by depositing cash or you can just bring a credit card)
Be prepared to wait in long lines! Especially at Hershey Park, there are usually long lines that can last up to 30 minutes. Make sure to be careful about where you're going and when you're going to specific rides. Strategize!
PACK SNACKS. This is always a great idea especially for being on the bus on the way there and on the way back. Usually in both parks but mostly Hershey the lines can get pretty long especially for food. Just pack neutral things like goldfish, chips, pretzels, anything that doesn't need to be refrigerated.
Don't go crazy. Take your time. Don't just start running to rides right off the bus, take your time getting everything together and just remember…you have all day!
Don't just get caught on playing the games! Try to actually go on some rides, don't waste your money on all the games.
Take a map. You'll thank me later.
HAVE FUN! Don't worry about all these things just try to do them if you can if you can't no problem just make sure to have fun with your friends and teachers.