Oh, I love those pond tours! Our club does them every second month or so, and some ponds just make me wonna faint, so wonderful!
Boy, I bet you have a good time, and give you some inspiration for future projects...

What is really very good about it is, that you can ask those pond and koi owners anything you like about their setup, filtration, pros and cons. I bet most of them had quite a few learning mistakes, and can give you so many tips on what to do better and more efficient.