I would say do it too. You never know what's lerking in those hawthorn patches. I used to have a hawthorn bonsai but I gave up on it and sold it. They're pretty high maintenance. Aphids and rust, primarily. If you like doing apples, you'll love doing haws. Everyone finds their favorites, but you don't know what they are until you grow them.
I have a large washington hawthorn growing next to the garage and I've got seedlings all over the place.