Right! As mentioned the logistics to having food delivered would be a nightmare. However some people do bring small coolers and rent lockers so they don't have to carry them all day. There is no rule about bringing your own lunch in. As far as the straw question at AK they still have "paper " straws.You can absolutely bring food/drink with you into the parks. Obviously, they'd prefer you didn't (for obvious reasons). No glass, no alcohol and just to be safe, hide your straws at AK (they use paper/recyclable now). And no, you can't have a pizza delivered to a park. A resort, sure.