I know that outside food isn't "officially" allowed in parks, but I have seen so many people posting threads about bringing in their own snacks, drinks, and even sandwiches to save $. How is it possible to "sneak" food in if our bags need to be checked upon entering the parks? Thanks!
Just pack a few things in moderation and Security never says a word. I think most people are reasonable about what they're packing -- some bottles of water, a couple of juice boxes, some healthy snacks for the kids. I've never seen Security stop anyone for a food violation, but think they would look askance if you tried to pack in a really large meal -- say Thanksgiving Dinner for your family.