Not all interpretation happens during a guided tour. If you have a question during your visit find a ranger. He or she should be able to tell you whatever you want to know. Of course, if you do find an arrow head or some other artifact, leave it in place and report the location of the find to the ranger. Remember, these finds are owned by all of us and need to be protected.
Good interpretation is fun.
Whether it's a ranger giving a nature talk or a character in period dress an interpreter's goal is to capture your attention and help you to understand the site you're visiting. If you catch the interpreter's bug you may want to research opportunities for further study where you live. You may find opportunities to volunteer as an interpreter and share your passion for nature and history. The National Association for Interpeteration and The Association for Living Historical Farms and Museums are two organizations you may want to learn more about. Check out their web sites and you'll learn more about this fascinating subject.