I just got back from my March visit, and in case someone else reviews this post, yes you can bring in food to the ladies of the house. You have to drop it off up front so someone else takes to the kitchen (which makes sense), but that’s the only restriction. And if anyone’s looking for suggestions, I’d lean towards something the ladies can’t just order themselves and have delivered (such as pizza):
Girl Scout cookies (great, but only available seasonally)
McDonalds shakes
Dairy Queen Blizzards
Subway (although not the best choice as it requires coordination with the ladies based on their tastes)