At a minimum, ensure all trash, coals, etc are taken care of. If you want to make Fred Rogers happy, pick up some trash that isn't yours and help make it a beautiful day in our neighborhood. 

No really, if you use the garbage, take it to the curb. Once it's empty, get your steps in and put it back. 

We get it, sometimes plates aren't big enough to catch all your mess. Nobody will judge you as long as you wipe it up, but if your neighbor gets their elbow stuck in your Popsicle juice they may think less of you. Remember, they can see who reserved the pavilion last.