-As you unpack your gear take inventory. Did you leave anything behind? Identify any items that are damaged or broken; make a list of what needs repair or replacement.
-Separate all clothes and bedding items that may need laundering. Don't wait to start doing the laundry, wash whatever you can as soon as you can to remove outdoor smells that can come from campfires, or from lakes, streams, and beaches, or from dirt, mud, and sand, etc.
-Be sure to air out any camping gear which may have gotten wet on the trip to avoid possible mold and mildew.
-It's a good idea to store your self-inflating pads and sleeping bags loose rather than in their stuff bags so that they maintain their loft.
-Clean all kitchen utensils, cookware, dishes, glasses, and silverware. Return kitchen items to where they belong and store all camping specific cooking items together. To help keep these items organized, consider using a chuck box.
-Return any leftover foods to the refrigerator or the pantry, as necessary, and discard any foods that may have spoiled. You'll know which ones. Just let your nose be the judge.
-Make sure that any camping stoves and lanterns and turned off and that all fuel containers are properly stored.
Take good care of your camping gear, and it will reward you for many years to come. By using an after-camping checklist when you return from each trip you'll always be ready for the next.
From http://camping.about.com/od/campinggearchecklists/a/aftercamping01.htm