OP: I pack my lunch for work, but because of severe food allergies cannot use the microwaves work provides. So if I want a hot lunch, I bring my own from home, already heated and ready to eat.
My solution: Stanley brand vacuum food jar. I like this one: http://www.stanley-pmi.com/store/stanley/en_US/pd/productID.325305800 but they have ones of various sizes and that will keep things hot for various lengths of time. Although I have a similar Thermos brand one, the Stanley keeps food hot longer (and per specs was supposed to) and is what I use for food (the thermos I use to bring boiled water to make tea). Stainless steel and IME quite rugged. Some of the Stanley models will keep hot food hot upto 12 hours.
I microwave or otherwise heat my food at home (stews and soups works really well, and fresh out of the overnight crockpot is quite nice
) and then fill up the food jar with it. It stays nearly the same temp by lunch -- sometimes it is a bit too hot because not much temp has been lost. I have never had mine (I have 2) leak on me.
This might be a solution that would work for you. You could prepare and then use or reheat a safe meal at your villa, then use the food jar to bring it into the park. The main challenge will be finding the kind of "one dish" recipes that work well for this, though for myself for work in addition to stews and casseroles, I sometimes just bring chopped up chicken breast on top of rice with some cooked veggies mixed in - if rice isn't an option, more veggies could do.
SW
My solution: Stanley brand vacuum food jar. I like this one: http://www.stanley-pmi.com/store/stanley/en_US/pd/productID.325305800 but they have ones of various sizes and that will keep things hot for various lengths of time. Although I have a similar Thermos brand one, the Stanley keeps food hot longer (and per specs was supposed to) and is what I use for food (the thermos I use to bring boiled water to make tea). Stainless steel and IME quite rugged. Some of the Stanley models will keep hot food hot upto 12 hours.
I microwave or otherwise heat my food at home (stews and soups works really well, and fresh out of the overnight crockpot is quite nice

This might be a solution that would work for you. You could prepare and then use or reheat a safe meal at your villa, then use the food jar to bring it into the park. The main challenge will be finding the kind of "one dish" recipes that work well for this, though for myself for work in addition to stews and casseroles, I sometimes just bring chopped up chicken breast on top of rice with some cooked veggies mixed in - if rice isn't an option, more veggies could do.
SW