Cedar Fair has 11 roller coaster parks:
California’s Great America, located in Santa Clara, CA
Canada’s Wonderland, located in Vaughan, ON, Canada
Carowinds, located in Charlotte, NC
Cedar Point, located in Sandusky, OH
Dorney Park, located in Allentown, PA
Kings Dominion, located in Doswell, VA
Kings Island, located in Kings Mills, OH
Knott’s Berry Farm, located in Buena Park, CA
Michigan’s Adventure, located in Muskegon, MI
Valleyfair, located in Shakopee, MN
Worlds of Fun, located in Kansas City, MO

My mom is now the group sales manager at Cedar Point, having previously had similar jobs at Kings Island and Dollywood (not a Cedar Fair park). Cedar Point is, nearly without question, the best roller coaster park in the US, probably the world. Through her position, Maria and I were able to get discounted platinum season passes, which get us into all the parks owned by Cedar Fair. We used the passes at Michigan’s Adventure, Canada’s Wonderland, Dorney Park, Wildwater Kingdom (in Aurora, OH, waterpark owned by Cedar Fair), and Cedar Point. We also tried to goto Kings Island, but it was raining. The passes also get us free parking and a discount on food and merchandise. If you’re in California or the Midwest or Mid-Atlantic, the Cedar Fair season pass for multiple parks could be a good option if interested in a roller coaster road trip:

I’ve been to Kings Island (many, many times, having grown up 2 miles away) and Kings Dominion before. Surprisingly, I don’t think I’ve been to Carowinds. We wanted to add Valleyfair to this trip, but didn’t have time to make it work. I don’t know much about Worlds of Fun or the California parks.