jeff, listen to Phil. I highly recommend you have the permit in hand before you attempt to bring an ATV or golf cart to AC. Even if it is for personal use!
I know of another poster who owned a home here and brought an ATV with him. He had to send it back to the mainland and I think he ended up selling it. Permits take time. Good luck.
That was me and Ragman is right. Get your permit first and I don't mean the promise but something in writing.