OBX good lovin
My family gets together out there yearly at Corolla and one of the events is always the 4WD beach areas either in the North OBX (Currituck Cty) or down at Cape Lookout Seashore, it's easy fun and you don't need to gear up like you're going to Moab or Rubicon so long as you have 4WD. Unless you are just in the dead of winter in rain you'll always see a fair amount of people driving out there and usually a few that don't mind stopping to help since people actually live up there at Carova. Like others said it's not too bad as far as off-road areas go, just stay off the dunes and out of the water and you'll be fine until the last mile or so near the VA border where it gets super soft and very tight at high tide. The entrance ramp is indeed usually one of the worst spots and the tourists with low AWD cars generally are the first casualties to get stuck so if you can get through that everything else is pretty easy. If you have just basic A/T tires you'll be fine.
Also, hate to be a buzzkill but I'd rather it be known so some of you guys don't get popped enjoying any vacation up there as we definitely saw a lot of more sheriff's and tickets last summer than ever before. Currituck County requires a paid ($50 for 10 days) permit to stop if you want to set up during the summer months. If you are just driving through and temporarily parked and walking around the water, the sheriffs that patrol there generally won't say anything but as soon as you start pulling out any chairs or tents be prepared for them to stop and ask since it's a giant obvious permit for your rearview mirror.
^I've heard that South Core was fun and much more secluded and remote, just not sure my wife would be up to it as she needs her hot showers most we've done is the main North Core areas of Cape Lookout. During the day you can definitely go and have the beach all to your self and barely see anybody on either side or drive past once you get down there pretty far, even during summer times. Love it so I can finally let my dog run loose without worrying about any beachgoers complaining about him being on a leash.