Hi Ian, Nanpu Kai always put on a great show, one of the best. I go almost every year. If I were in town, I would car pool with you. Little Tokyo also has their Nissei Week festival at the same time, which is very interesting for the whole family. I'd bring the wife and kids. They would enjoy it. Don't forget to post bonsai pics later.
Don't forget Kofu has an auction on Saturday too.