1. Do not encroach on another's campsite.We hate nothing more than another camper taking a shortcut through our site. You're sitting outside reading or sleeping and a fellow camper comes lumbering through on their way to the shower, bathroom etc. This is just rude! Please, even if it's a little longer, go around.
2. Build your campfire properly and use properly cured wood, not wet or green wood. Build your fire with a large flat rock to the back to channel any smoke and smaller rocks on the side. Leave the front open to channel the incoming air that fuels the fire. You can still do this with poorly designed fire rings by propping the front and placing a large rock in the back. When finished with the fire, don't let it sit and smolder and unattended. No one likes smoke coming in their camper at night.
3. Dumping, even when you have a sewage hook up can be a smelly event. Don't do it when your neighbor is sitting outside trying to enjoy the fresh air. Make sure you are using a threaded fitting or a tightly fitted doughnut.
Just following these steps will help you be a good camping neighbor.