Canada's Wonderland
Wildzone Adventures
Colasantis Tropical Gardens
La Ronde
Michigan's Adventure
New York, New York hotel and resort
Marineland
Cedar Point
Kings Island
Geauga Lake
Waldameer
Knoebels
Dorney
Six Flags Great Adventure
Lake Compounce
Carowinds
Kings Dominion
Busch Gardens Europe
Silver Dollar City
Dollywood
Indiana Beach
Holiday World
Magic Kingdom
Epcot
Animal Kingdom
Hollywood Studios
Seaworld Orlando
Universal Studios Orlando
Hersheypark
Kennywood
Worlds of Fun
Six Flags America
Six Flags New England
Six Flags St. Louis
Nascar Cafe
Beech Bend
Six Flags Great America
Alton Towers
Thorpe Park
Chessington
Pleasure Beach Blackpool
Vidampark
Prater Park
Rainbow Magicland
Mirabilandia
Movieland Studios
Gardaland
Adventure Island
Adventuredome
49 parks, but I just did this off the top of my head so I definitely could be missing a few. With a count of 312, that would be about 7 creds per park. I'll be adding the following next month to round off the 2012 season:
- Disneyland
- California Adventure
- Knotts Berry Farm
- Universal Hollywood
- Pacific Pier
- Belmont