A bit of success with the last post – Tree number 6 is some sort of dogwood. I’m voting for Cornelian Cherry because it is clearly a planted tree and the nursery where I believe at least some of the trees were purchased sells it (along with a Chinese dogwood, but a fruiting cornelian cherry makes sense in a fruit orchard setting.)
On to more of the unidentified trees; we have ones blooming this time (we will watch for any fruit, but in the meantime . . .):
Tree 7
Tree 8
a middling life 
Sweet Cherry, Prunus avium, and an apple.
Thank you so much for your help. I’m so excited to finally be getting closer to figuring out this orchard. I’m going to continue to post photos – maybe three or so more posts to get them all covered.