ATM1031's map shows the current boundaries of the land owned by the park. It looks like a good portion of it is leased out for agricultural purchases.
Tax records show that the red lot on the east side was owned by the park pre-Paramount. The green lot on the south side was purchased by Paramount in 1996. There is a lot of acreage in those two lots that I don't see used anytime soon.
I haven't found any MLS listings for land in this area yet...
The green area was part of the original land bought by Taft in the early 1970's. Paramount got the land when they bought the KECO parks in late 1992.
You can see all the former roads used for the Animal Safari just south of the water park. Matter of fact, about 70% of the water park, south of Racer 75, is on Animal Safari land. The rest of the developed old safari land has FOF, Pantherian, and now Rapterra. The land in green has never been redeveloped since the Safari closed in 1993. Though, I thought KD used a couple areas for dumping broken up concrete from former attractions.
The land east of the railroad tracks, in the dark pink color, is owned by KD and the eastern border of it abuts the western side of the fairgrounds land south of Route 30.
Also, the park owns the old Waccamaw Pottery warehouses north of Route 30 (north of the Burger King and motels - you see part of it in the photo above). That where the props/decorations for Haunt and Winterfest are/were stored.
As far as land sales go, the properties closest to Route 30 has the highest potential to be sold. I would think the warehouse property would be at the top of the list, followed by the land east of the park/railroad tracks. I'm not so sure about the land south of the waterpark as it is land-locked and not easily accessed due to the railroad line.
And keep in mind that Cedar Fair had been selling off undeveloped park land over the years, including Carowinds and Canada's Wonderland.