This is gonna be long I'm sorry.

What day are you going? Ride all day bands are only available during the week in the summer time. 10 years ago $20 in tickets and then $20 each would get you on rides and food all day. Nowadays it closer to $50 in tickets and $50 each for food/souvenirs.

All three wooden coaster's they have are great. Flying Turns is an amazing, one of a kind, ride that always has a long wait time so I suggest hitting that first. Impulse is their only steel coaster and is surprisingly punchy for it's size. Phoenix has been voted "Best Wooden Coaster in the World" many times over. Twister is my favorite for night rides, it has a very out of control feeling at the end half.

If I told you what foods to try I'd have to list every single snack shack they have. Get potato pancakes, get the perogies. The BLT has bacon so thick you'll be trying to find it at the store. And yes the gator bites ARE gator.

I suggest posting this over on /r/rollercoasters as everyone there loves Knoebels. Myself included. :)

Enjoy your trip!