I want to chime in about buying fresh items for each excursion. You always have to careful about cross-contamination and if a guest gets sick, you really don't know how 'sue-happy' they are. Using store bought, freshly opened, containers are your best bet. You may save a little money making your own, but in the long run you save nothing if you get sued. Plus, the extra time you spend making the food you cannot take off on your taxes, but you can certainly take off the mileage to the store and food you bought off on your taxes.