After a weekend of chip dipping, cheek squeezing, potato peeling, and picture taking in a place where no one in your party lives (say, this rented house in Napa), a lot of food will have been devoured. In expectation of gluttony, the organizers that be are likely to have over-purchased, and in a hurry to vacate much of that surplus will be tossed. Don't let it happen! Fill ziplocs with ice (yet another gift as long as you reuse the bags) and pack it all up for safe transport.
FRUGAN - living sparingly with regard to the detriment of one's wallet, environment, climate, society, and general sense of well being.
[i.e. the years I lived as a dumpster diver in NYC]