For what it's worth. Back when I had a 80 gllaon tub with wire covering it for a fish pond, I had a six foot vynal fence installed around the whole back yard a couple of years ago. For the most part, I had the fence replaced bacause my new daughter in law had cats that would wander. Once that I realized that the racoons were no longer able to climb the vynal fence, I finally got around to installing the in ground pond that I always wanted. The pond wnet in a year ago in September of 2008. To this day I haven't seen any signs of racoon activity in the yard. Out in the alley and from yard, the racoons get into everything that's not nailed down or locked.
Sure the vynal fence is a bit pricie, but the racoon's so far haven't figured out how to climb over this fence. I believe it is because they can't get their claws into the plastic. I would highly recommend putting up a vynal perimeter to keep the masked bandits out.
I used to sit in the back yard late at night with my 10mm, Glock 20 waiting for some coon activity, but my timing was always off. I have a feeling they were watching me from afar with night vision.:biggrin: