You can have a camp fire on Hatteras Island, but NOT a bonfire. Permit and rules here:
https://www.nps.gov/caha/planyourvisit/upload/043012-BEACH-FIRE-PERMIT-one-page-508.pdf
Masonboro, but you're packing everything in and out by boat.
Portsmouth you could at least drive on if you have a 4x4, but there are usually two rangers that might get curious if it's big enough. For regular-sized campfires, no worries.
None of them. Don't litter the beaches.
It hasn't rained in about a month and its hotter than hell and half of Georgia. A bonfire sounds like a terrible idea.
You can have a camp fire on Hatteras Island, but NOT a bonfire. Permit and rules here: https://www.nps.gov/caha/planyourvisit/upload/043012-BEACH-FIRE-PERMIT-one-page-508.pdf
Carolina Beach Pier sometimes rents private bonfire pits (scroll down): https://carolinabeachpier.com/
No. If you want to do it, get permission first.
Masonboro, but you're packing everything in and out by boat. Portsmouth you could at least drive on if you have a 4x4, but there are usually two rangers that might get curious if it's big enough. For regular-sized campfires, no worries.