Heya DiGi,
Something just occured to me. You are in Buckthorn heaven. Buckthorn is everywhere in the Chicago suburbs and it is INVASIVE. I used to volunteer at my local forest preserve when I was up there removing the stuff to let the native trees - hickory, oak, etc. have a chance at regrowing as the buckthorn strangles out everthing. I have read that Buckthorn is "the poor man's yew". If I was living in that area still, I would be targeting that stuff big time for learning on. Wish I could tell you for sure if it is a good bow wood, but perhaps others can chime in. I would find some 2-3 inch diameter straight ones and start playing with the stuff. Parks will be more than happy to let you remove it!
Parnell