@Waltron - The family blueberry farm (cousins including myself as a minority partner) is in Van Buren County, about 9 miles east of South Haven, and 15 miles west of Paw Paw or 25 miles west of Kalamazoo. We should meet up sometime, I'm on the farm 3 to 4 days a week, usually week days. I think you are pretty close to the farm. PM me if you'd like to meet up. That goes for all Michigan BNuts, if you want to meet up, I'm fairly gregarious. Love bullshitting about bonsai, it is more fun than the routine tasks around the blueberry patch. Though I love the ''farming life'', compared to my original day job in a windowless lab for 35 years. I now have a collection of pre-bonsai I house at the farm, with my more developed stuff at my home in northern Illinois. The farm is more woods than farm - roughly 50 acres of woods, only 25 acres of fields. Lots of tree species, and a crap load of volunteer elms in the fields that need to be removed.
Your trail cam photos, and trees for possible collection photos all look like similar habitat to what the farm has. Instead of pheasant, we have turkeys but otherwise the line up is similar. Really nice.
On the farm I've got a different line up of trees, but not wildly different. The family group only bought the farm about a year ago, so I haven't had time to dig much. One area is beech, maple, & hornbeam with witch hazel, pawpaw and lindera as understory. In the fields, weed trees of Elaeagnus (autumn olive) elm, red oak, juniper virginiana, sumac & sassafras with the occasional hackberry. Another area has one of the birches, either black or sweet, but I'm not sure which, plus catberry or mountain holly(Ilex mucronata) , and poison sumac, higher up the hill there are Liriodendron (tulip poplar). also nearby, hickories of some sort (not shagbark, maybe bitternut hickory) also red pine - Pinus resinosa the MI native pine. Soil throughout is sandy and deep, meaning most trees that normally develop tap roots are too difficult to collect, but younger trees, and species without tap roots are easy to dig. So as time permits I've been scouting new trees to dig, but alas, haven't had as much time for that as I would like.