Hmmmm..... well, my advice would be to head on over to Epcot Center and check out the Le Cellier Steakhouse and the German restaraunt called Biergarten. They should supply you with all kinds of high-fat, low-carbohydrate meat, salad, and cheese-type yummies that are absolutely gourmet in taste, and not all THAT expensive as far as theme-park food goes. Animal Kingdom has the Flametree Barbecue, which the site says is even cheaper. I would strongly advise against buying food from the Magic Kingdom or MGM studios, though.... their restaurants are really-designed to be more 'kid-friendly', which means lots of pasta, ice cream, , pastries, candy EVERYWHERE you go, etc. *shudders* If you MUST eat there, find yourself one of the smaller burger/hotdog stands and remove the bun so that you will not have to deal with all the sugary junk in restaurants....provided you are not a fellow veggie, of course. At any rate, it'd probably be a good idea to keep some small snacks in your purse or pocket while roaming the park(s).

Hope this was helpful! Enjoy your trip, as it is to a wonderful place!