I want to start a very small orchard of persimmons, probably about 15 trees. I have not even chosen a variety yet, but it will be non-astringent Asians, not Americans.

I want them to be either totally seedless, or have as few and as small seeds as possible.

My question is twofold
1. What are some good-tasting seedless or near-seedless varieties?
2. How do I keep them seedless? From what I am reading even seedless varieties will grow seeds if the trees are pollinated by other trees, so do I have to plant all the trees really far apart? How do I prevent them from pollinating each other and making seeds?

thanks