Here are some suggestions for foods that I think are good choices for con, for those of you who like hearing ideas or have grocery shopper's block. Please don't diss me, I'm sure you all have suggestions to add so just quote me and add stuff, I'd love to hear your suggestions. My credentials? A college nutrition course, two winters of backpacking in death valley, and years upon years in a ballet company where i had to know how to sustain healthy energy for hours and hours, like we'll be doing at con. You don't have to take my suggestions if you don't like them, cuz I know that some of this stuff is pricey.
DRINKS: vitamin water, gatorade, crystal light packets and tang and other powders will work wonders on plain water if you don't like plain water, tea bags (coffee pot can make tea the same way it makes coffee), orange juice, juicy juice... tea is probably best for your health, and you can get fancy with the herbal-remedy-for-con-ailments idea.
GRAINS/BREADY STUFF: poptarts, french bread is usually a dollar in grocery store bakeries, granola bars, other bars, rice cakes, pita bread/chips, whole wheat bread, rice (rice cooker), cheerios (most cereals are pretty good raw), popcorn (marriot has no microwaves though), BAKE TONS OF OATMEAL COOKIES or other nice baked goods like banana bread or corn muffins
PROTEINY STUFF: cheese*, soy things*, peanut butter, beef jerky, yogurt*, almonds, other nuts, pumpkin seeds... get creative and make some personalized trail mx with all your favorite stuff in in, like m&m's and peanuts and sunflower seeds and raisins. Since cooking doesn't really work in hotel rooms, go to La Vic's or another nearby restaurant and get protein.
PLANTS: (i don't know what's in season in may but whatever) cherry tomatoes, carrots, avocado, prepackaged salads with dressing can be mixed and tossed in the bags they come in*, papaya, pineapple, cherries, grapes, apples, any dried fruit (dried fruit must be accompanyed by water or else you will be dehydrated because your body sucks up a lot of water digesting fruit)
So the idea is to keep variety in your diet as much as you can. Vitamins are important, and a good way to get what you need is try to get all the different colors of fruit and veggies (red, green, yellow, etcetera). Bread is your friend! No, carbs are not bad. If you drink enough water with them your body will produce ongoing energy and they will not turn into fat if you use them up (not hard to do at con). Protein will sustain you. Good fats (nuts beans fish) are used up doing light things such as walking and ballroom dancing. Nuts and beans and fish (the second two perhaps in the form of burritos or fish tacos from la vic's?) will help you a lot. Peanut butter and jelly sammiches may seem unappetizing if you used to eat them every day, but you all know how some things are surprisingly appetizing if you're truly hungry. Whipped cream is good for quick energy. And quick other things. *censored*
*must be refrigerated, use the ice bucket and dump water/replace with ice when you take a break from con to eat or whatever. or use fridge or cooler.