Here is my final concept for Pirate Island in repurposing the land for the rapids:

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Now before I go more in depth with this, I'd like to make a case for bringing Pirate theming into the dry park. While Carolina Harbor does have references to Pirates, it feels woefully underutilized. Pirates have great potential for theming, and they deserve something more elaborate than a repainted splash playground and a slide complex.
This concept is meant to be Carowinds' equivalent to Ghost Town or Wildwood Grove, as a large themed area with interactive elements and family attractions. It would be one of the most ambitious additions in the chain, and some of the notable elements include:
Twist 'n' SplashMack Rides Twist 'n' Splash themed to floating powder kegs ("Battle Barrels"?). I've already explained why I'd like to see this (low space, high capacity, low maintenance, etc.).
TavernThis would fill the gap for the park's full service restaurant. I'm not entirely sure about the elevation changes, but I know that it's significant enough to warrant Rapids having a lift hill back to the station. For this reason, the restaurant would have two stories, with the top one being the one entered from the regular midway, and the bottom one being a basement with a bar (explaining the tavern part). Upper level would be the family friendly version. The menu would be made up of seafood for the most part.
Show StageAnother realization I came across while developing this concept is that Carowinds is severely lacking in shows. Other than Cirque and Peanuts, and that one nighttime show on the plaza stage, the park doesn't have any big, choreographed shows. This attraction would take a page out of Canada's Wonderland's playbook as a high-diving show. The stage would be themed as a ship, there would be a swordfight, and the loser of the fight would be forced to "walk the plank" (dive) into the water.
KrakenAnimatronic Kraken that comes up every 10-15 minutes. This would be our equivalent to the singing mushrooms at KD.
Interactive PlaygroundShipwreck-themed playground similar to Shipwreck Shore at Shanghai Disneyland. There would even be decks where you can pretend to fish. There would be water cannons, and a small room representing the "Captain's Quarters" where you can find props and treasure.
Shops & ExhibitsI figured these could be made up of craft shops, small colonial houses, and exhibits featuring characters. One of these could be the return on "Fowl Play", a show that used to be at the park featuring birds. Parrots would be the main stars of the show because... Pirates.
LagoonI'd hate to lose all those trees, but another thing Carowinds is missing is water features. This would help with placemaking and making guests feel as if they are on a remote island.
Overall, I feel this is something that could really make the park stand out. It's littered with easter eggs and experiences that everyone can do, whether they're coming to the park to ride things or not. I don't know if the park is reading this, or if they've given up because I've spammed the thread for the past five years, but remaking the area into something along these lines, pirate-themed or not, would be an incredible addition to the park.