Really? Being from VA Beach, the closer you get to here on OBX, the smaller it gets. Go south to Pea Island, Rodanthe, Avon, or even Buxton. If the wind is out of the north, or is cross-shore/off-shore on the eastern-facing beaches, go to Frisco. If you want a location with people around, on a good day there should be guys in the water at S-turns (just north of Rodanthe), and/or the Hatteras light house. Another thing to consider is the water is going to be a good 5-10 degrees warmer in March/April at the Hatteras light house than in Nags Head.
Oh contrer mon frer. Duck pier breaks when all of OBX is flat. plus hiway 12 past Oregon inlet is 4x4 only.
Go south. Hopefully the wind won't be howling, that would concern me more than a complete flat spell at that time of year.