If the trees you planted were grafted cultivars then the fruit from the suckers/sprouts are not what you signed up for.

I'd remove them anyway unless you want a thicket growing there.

All 50 were purchased from the Missouri state nursery, so it's very likely they were propagated from seed. The trees are all growing in areas that will not be landscaped or be close to the house.

My main concern is maximum fruit, and I don't care what they look like. Just not sure if there would be more fruit from single trees or clusters all sharing the same soil resources. Thanks

I believe that you would be better off with a single trunk. There will be much better light exposure and better air circulation that way. In fact, for best fruit production, you may even want to thin the trees later on. Shaded parts of the tree will produce considerable less fruit.

If the trees are growing multiple trunks and weren't grafted, they were almost certainly cut off / mowed down at one time or other.