NC Wildlife ENFORCEMENT Officers. Wildlife handles boat registration/titles as well as hunting/fishing licenses. They have an extensive enforcement department.
BUI is a class 2 misdemeanor which means it's fairly serious. There are some differences between boating and driving, notably that there is no implied consent. You should find an attorney with experience with BUI charges. In addition, and I don't know if it applies in your case (which is why YOU need an attorney who can see all the facts), is there's no "not a drop" provision in the boat regs. If you're under 21 the standards for being "under the influence" are the same as those 21 and over.
BUI doesn't affect your (land) driver's license. PJC is generally not available for DUI, don't know about BUI.