I totally agree with PP's-go to Knoebels! Delicious food, free admission, free parking, you can bring your own food if you want to save money (they have shaded picnic tables-but trust me their food is inexpensive and yummy), free music at the bandshell, mini golf in the park, the Crystal Pool, etc. I highly recommend trying Cesari's Pizza, funnel cakes, carmel corn, and the fresh cut french fries near the front of the Alamo Restaurant.
We drove past Dutch Wonderland again last week when we were in the area for Day Out With Thomas, and I had absolutely no desire to go there. The parking lot was packed on a Wed afternoon, so I'm guessing there lines were fairly long for the rides. Not to mention, if DH and I are paying admission to the park, we expect to have some big coasters to ride.