http://www.knoebels.com/ There is a phone no. and email for information too,
Check to see, but I think on weekdays if you show the AAA card you get a discount on the tickets on site, Or AAA online may have an order site.
To do 3 days of driving to Hershey is pretty far to stay in Pine Grove,
I Know that we use to use the tickets for the preview the night before, and then spend the next day at Hershey and that was enough for us. Then you get the extra hrs for the one day pass. They stamp the ticket the night before, then you can use it the next day.
I know the cabins do sell out fast at Hershey, If you searched Cabins instead of camp grounds I think I remember, yeeeaaarrrs ago staying at some near Hershey.
It may be worth checking into just staying at the Econo for the night or two, then go to Pine Grove or Knobels area to cabin and camp,.
Hershey is HUGE.....almost the cost of Disney anymore, disappointing, and the parking on top. Just the drive is kind of far for a three day pass. From Pine Grove, to Lancaster is about the same drive. No big amusments rides there, Train ride, historical, Dutch Wonderland.
There are some really cute places to stay in or near Hershey two, for just a night or two.
The water park at Knobels has few water attractions, water slide and huge pool, the activity area water park is more for the toddler age.
Up North further are the water parks in the Pocono's were there is great cabins and camping too.
Anywhere you decide and what ever choices you make the kids will have a wonderful time. Shame Hershey Highmeadow is booked.