I have heard the open carry while driving (or just sitting in a vehicle) is considered concealed. When I am driving I take my gun off of my hip and lay it in my passengers seat. Dont know for sure why if it is on your hip while driving it would be considered concealed, but it is. As far as going out to eat....as long as it is a gun friendly place. Meaning that they dont have any "No Guns Allowed"signs posted. But even if they do it is not illegal to OC in their place of business but you may be ask to leave and would have to do so. Refusing to leave would be trespassing.