I know this may seem like a dumb question to many but does anyone know if larch is a good species as bonsai in the Chicago area. I think it would be okay in winter but we can get steamy in summer.
I see it is a threatened species in your state, so collecting is out, but there are plenty of sources for larch. You'll enjoy working with this species.
Not sure what your budget is but Brussels has a really nice one $175.00 http://www.brusselsbonsai.com/shopsite_sc/store/html/deciduous_miscellaneous.html
I have seen it when I was there, the picture does not do it justice. (my budget does not allow a tree of that price)
I did purchase a couple larch seedlings last year and they are doing good here in zone 8.