Awesome gardening! I love how you concentrate on growing a few crops and make effort to get a lot of diversity.
I’ve planted a popcorn grex (of 4) a km from my flour corn grex and a grex of beautiful but useless ones 7 km further on. I think to get more pollen donated from farmers growing it for cows than that they’ll interfere with each other.
I have taken some pollen stalks if they’re called that and by hand dusted the stamen of others nearby. I have hung those stalks kind of in them, waiting for another batch of pollen to arrive. Do you aid cross pollination?