I've visited Adventure World today and found out that Season Pass upgrade is on sale (inside the park) - currently only $47 for Adult $40 for Kids.
Their website says ADULT SEASON PASS WAS$159.50 NOW $120, which is not true.
Full price for 1 day pass is $54.50, $40.50 if you use Entertainment Book offer (-25%) + $47 for upgrade = $101.50 total, $87.50 with the Entertainment Book coupon.
If you need more than one Season Pass -> 1 Adult can go inside and buy $47 Season Passes for the whole family (waiting outside), give them season passes so they can come in.
As a bonus you can enjoy 20% off cafeteria/merchandise/photos services same day, just show your red season pass wrist band.
P.S. Ad after entrance still shows old upgrade prices, ads in the toilets show the new price :)
Can you do that? I thought you would only be able to buy 1 season pass for yourself