You do not have to spend all day in camp to do this, but checking in once or twice and taking the trash if there are a couple or three full bags is a good idea. Deal with the leftovers. If people will want some to eat the next day, ziploc bag them and put them in the coolers. We often have a lot more food than we can eat, so we tend to take some of the excess to the front gate or the chirurgeons. You decide how much to save and how much to take to them, and you are responsible for taking it.
Clear table tops.
Put away table cloths. Make a bucket of sterilizer water, and wash off the tops of all tables. You do not need to wash the legs. Take all garbage bags to the dumpster. Rinse out the garbage can, including the lid, with sterilizer and water mixed in the proportions given on the sterilizer bottle.