Air down to the recommended psi. It not only gives you better traction, but it also takes some of the strain off of your transmission. Driving on sand is hard on your vehicle.
Driving is permitted 24/7. But...
You can put air into your tires at Wink's of Corolla at 1150 Ocean Trail Corolla, 27927. It is the closest place to put air in your tires. You may have to wait your turn. Many tell me they leave the air out of their tires during their entire visit, but I would rather keep the recommended air in my tires for road use.
Don't let your picture be on Oregon Inlet Idiots; do your homework before you drive on the sand.