I always bring ear plugs. The soft foamy comfortable kind. Very useful whether sleeping inside or out. My 1st RAGBRAI with Team Megawatts a team next to us had a very drunk couple come back as we just retired to our tents. They treated us to a little neighborhood theater by launching into a loud profanity laced yelling match like I've never heard before or since. In went the ear plugs and off to sleep I went. I suggested them already to our recently added members.