Knoebels opened the morning after the storm with minimal closures due to the "family" of dedicated workers who show up (often w/o being called) to help clean things up whenever a storm/flood rolls through.
There is a teeny tiny Weis Markets on Main St in Catawissa which is about 10 min from the park, but I would call to see if they have the tickets since they are so small (seriously, it's just a little larger than a Wawa!).
Because of it's location, the only parking for Knoebels is in the field next to the park. Parking is free, admission is free, and they have free picnic tables available (many shaded) between the parking lot and park if you get there early enough to park a cooler on it

. Take a look at the rides and how long you plan on being there, then decide whether the handstamp/bracelet or tickets would be a better choice. Keep in mind that Knoebels tickets never expire, in case you don't use them all (this is only good for the regular ride booklets, not special tickets given out for company picnics). Be aware that most of the park is gravel, so I recommend sneakers instead of sandals/flip flops.
I highly recommend eating Cesari's pizza, funnel cakes, ice cream from The Mill, and fresh cut french fries from the stand next to the Alamo. To take home I usually buy caramel corn, sugar waffles (from Totem Treats in Kiddie Land-they're like a crunchy funnel cake), and some type of fudge from Stony Gables

. **Note: Do not buy the fudge early in the day unless you have a cooler to put it in!