If you want to add to your Nuka World experience (or if you don't want to pay for the DLC) know that there are a number of Nuka-related Fallout 4 mods out there. They won't take you to an abandoned amusement park but they're still worth a look.
If you want to swap out your Power Armor for a Nuka Cola sponsored version of the T-51, you can do that with this mod.
Developers have also started creating Nuka World mods including this excellent add-on that delivers new clothes and items.
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