Man, I wish I went with you guys when you guys went to Williams Grove. That sounded like a blast.
Anyway, it's a toss up between SFNE, HP, and Knoebels. But if I had to decide I would pick Knoebels since it is such a very family oriented park and it's not run by one of those big theme park industries. Yeah it only has 3 rollercoasters but who cares, it's about the atmosphere, cheap food, and not having to pay a gate and parking admission.
A few crazy Westcoasters on the little train at Knoebels during the 4th of July weekend meet.