I don't have any specific suggestions, but there are a lot of just add water or just add milk type of things that you can find at the grocery store that are pretty good.
My DW and I always send down by UPS ground ahead of time a care package with all sorts of snacks.
I would think of some canned things like canned chicken, turkey or tuna. You can add those right into pasta. There are a good amount of boil in the bag items out there too that do not need to be refrigerated.
It might be worth the $20-$30 or so Taxi ride to the grocery store to get some fresh items. I would think preplanning would be key. Over the next few days go to the store and make your dinners out of the Microwave. That way when you are down there you will already have a list and menu.
Good luck and there's always PB&J in a pinch.