Carlton is right next door to the 210 & 35 exit. It is a couple miles E once you exit 35. I have never bought trees from him, but I have seen his ads and received his mail solicitations. I assume he gets his trees from Baileys Nursery or some other such source.
I agree with your choices of Summer Crisp and Ure for pears. I doubt that you will lose a tree, but you may have a situation where the flower buds are killed or damaged in some years due to late spring frost. I am familiar with Loma but not So Sweet. An issue is to find them. One of the Canadian nurseries that shipped to the U.S. has recently changed owners and in 2016 is selling only apple trees.
There are several varieties of Plums which should work for you. Raspberries for early or mid summer would be Boyne and Nova and for later summer and early fall Polana. I don't know of a variety of Black Raspberry which is reliably hardy in zone 3.