The tax law thing is more of a county issue than state (I'm no lawyer but I'm sure about this - been dodging NC and SC taxes for years, good at it too).
The problem with Horry County, SC is that they exercise a state law that allows taxes to be imposed after only 60 days consecutive or 90 days combined (word has it that the Commissioners are already considering repealing their option as it has caused considerable loss to all marinas).
In answer to your question I'd avoid Hague and especially avoid Anchor Marina! Fisher's Silver Coast Marina is your only good choice.
FWIW, Hewitt at Holden Beach, Bennetts Brothers in Wilmington, Cape Fear Boat Works (910-371-3460), and Swan Point Marina and Boat Yard (910-327-1081) are all good.
For more info you could also consult with any local "gray haired" marine surveyors. Good Luck.
Bill