I didn't get any responses before I left, so I left it in the car. I saw the signs at the entrance that has some sort of law code on them too-which I guess is an enforceable municipal statute.
What's the deal with carrying on city property? As in the whole city, or city run buildings like the bans on government buildings?
Generally speaking a city or county can restrict carry in their building, parking lots, and adjacent grounds. For instance, you can't carry in the courthouse, in the parking lot, or any of the grounds of the courthouse. But walking along the sidewalk in front of the courthouse should be fine. Maybe this will help. Notice that vehicle storage if fine.
(f) Nothing contained in this section prohibits municipalities or counties from application of their authority under G.S. 153A‑129, 160A‑189, 14‑269, 14‑269.2, 14‑269.3, 14‑269.4, 14‑277.2, 14‑415.11, 14‑415.23, including prohibiting the possession of firearms in public‑owned buildings, on the grounds or parking areas of those buildings, or in public parks or recreation areas, except nothing in this subsection shall prohibit a person from storing a firearm within a motor vehicle while the vehicle is on these grounds or areas. Nothing contained in this section prohibits municipalities or counties from exercising powers provided by law in declared states of emergency under Article 36A of this Chapter.
http://www.ncga.state.nc.us/EnactedLegislation/Statutes/HTML/BySection/Chapter_14/GS_14-409.40.html