I am not sure if this will be on "ongoing" / daily deal, if so I think this would be the applicable:
15A NCAC 18A .2638 GENERAL REQUIREMENTS FOR PUSHCARTS AND MOBILE FOOD UNITS
(a) A permit shall be issued by the local health department which provides sanitation surveillance for the restaurant or commissary from which the pushcart or mobile food unit is to operate, if the local health department determines that the pushcart or mobile food unit complies with these Rules.
(b) The permit shall be posted on the pushcart or mobile food unit. Grade cards shall not be posted.
(c) The local health department which issues the permit shall be provided by individuals receiving a permit a list of
counties and locations where each pushcart or mobile food unit will operate.
(d) Individuals receiving a permit to operate a pushcart or mobile food unit shall provide the local health department
in each county in which food service operations are proposed a list of locations where they will operate. Such lists
must be kept current.
(e) Prior to initiating food service operations in a particular jurisdiction, the operator of the pushcart or mobile food
unit shall submit to that particular jurisdiction such carts or units for inspection or reinspection to determine
compliance with this Section.
(f) Pushcarts or mobile food units shall operate in conjunction with a permitted restaurant or commissary and shall
report at least daily to the restaurant or commissary for supplies, cleaning, and servicing.
THERE is a reg for "Temp" establishments in that same PDF. But it sounds like you need to contact Rockingham County Health Dept for your permits.
Licenses (to run a biz) are done by the city, for example, I have a Greensboro Priv License for my company, I suspect the same will be needed.
(Same kind of stuff as your regular biz)