Check out CoastalCarolinaOffroad.com Lots of people from wilmington, would be a good place to get in touch since you're moving out there.
For the beach, air down your tires, Make sure you have recovery points and if you start to get stuck dont floor it, the jeep will just sink in the sand. But If your moving, keep your self moving. Don't stop at the entrance if you can avoid it, and keep your eyes out for deeper tracks so you don't bottom out.
Thats the best info i can give. I take my tj and suburban out there and rarely have any trouble. Never been stuck out there either, but have seen many stuck in things ranging from pickups to bmw's. Then i've seen an explorer stuck at the front and a honda element all the way at the end of the beach.
2002 tj sahara 3" lift 35" km2, AtoZ rockers, 8k warn, 4.56 gears, lock-rites front and rear