I spoke today with our local horticulturalist, and she confirmed that our preferred site for an orchard would likely work well.
Now we just need to find some trees! My mom sent me a link to a place not far from here that has hardy trees raised in our climate, and I definitely plan to check them out.
I knew we could grow apple trees, and some types of cherry, but plums ... grapes, even ... and apricots! I never would've guessed.
I think I just found the next thing to go on my birthday wish list. :)