It is still being built. Under the law it will not be illegal to open carry there with or without a permit, neither will it be illegal to conceal carry there so long as you have a ccw permit from any State (AZ recognizes ALL states). If for any reason they were to post a sign banning weapons then you are only allowed to conceal carry there until asked to leave for ignoring their sign (assuming someone notices you are carrying). If you then refuse to leave you could then be charged with trespassing.