Well I'm no longer a teenager (20 years old here and starting my junior year of college this fall) but I too am quite envious of all the wonderful experiences that people have - meeting cast members, going backstage, and the like. I have no theatrical talent whatsoever (scared to death of even getting up in front of people) but I have a lot of respect for those that do and absolutely love watching shows (I'm a Broadway newbie as I just saw my first show only 2 years ago). I worked crew on the last show our school did and absolutely adored being a part of the production - being backstage is my limit to participation!
I can relate to the props thing though - my roommate acts and she was in charge of props for one of the school shows. We went on many a search to find the props (really odd obscure stuff too) and then I heard horror stories of how people were abusing the props and just giving her a hard time.
I wish you the best of luck in your quest!
~Jessica
"If you start from a place of joy and charm, you can get away with a lot in the second act. It may be that that's my life. I'm not sure."
~Roger Bart