Use a sound machine in the tent! I had no idea this would be an issue until we experienced it, but baby goes to bed much earlier than most people in the campsite, and the noise of people laughing and carrying on can wake them up and cause so much fussiness. So pack your white noise machine (we use an app on our iphone) and it will give a great night of sleep to everyone. Things like unzipping the tent to use the restroom at night wont wake them, as well as animal sounds that are loud in the woods.
Finally, don't pack too much to do and make SURE you unplug! It is always tempting to take the five books you're meaning to read and the nineteen toys your baby likes in order to keep everyone busy. But I'm finding that is just more clutter and takes away from just laying outside and enjoying being with your people. So turn off your phone, put them in the console in the car, and enjoy the time to breathe in and breathe out and realize God made all this gorgeous world to tell you that He's really good and that he loves you.