Ism,
Another possibility for you, and this might take some time, but it has worked for me to some extent; go to any of the local fairs, Lutheran Memorial fairs, or religious fairs that have any kind of historic bent to them. They can be just local fairs, but a lot of the religiously oriented fairs that are also historically oriented might have what you are looking for. And that item you are looking for is any book that has the local history - this can include maps, plats of a family land as opposed to a county plat, as well as historical photos. Now, I know the photos came generally after the time you are looking for, but any photo from the 1860's on, that has original buildings on it, can be of great help. Once you find any of those kinds of books, start talking with the author - they are often the ones selling the books at the fair - and they often have family roots in the area. The photos might be from the 1960's but buildings in the photos can be from the 1850's or even before. In talking with the author, you can find a resource for who they spoke to about the photos that are in the book.
I did just exactly this, went to a farmers place the I knew about, and was stunned to see not just the house in the photo, but a barn from the 1820' or '30's that was in the photo, and still standing. This was just a couple years ago.
This is networking - it can be a slow process, but it can be very productive as well. I purchased two books this way; and a magnifying glass comes in handy when looking at some of these photos. When speaking with the locals about these areas, you can show them the photos that they provided for the book sometimes, and ask them to point to that part of their property.
These families often have hand drawn maps of crops/crop-rotations, building locations, etc. Not always drawn to scale, but still pretty useful if you do a bit of by-guess-and-by-golly. It's a great way to meet people, and that you are interested in the history often will open the door to much more information.
I recently found out about someone that I know, but I didn't know they did a lot of research on some of my ancestor history. I stopped by there last Saturday to speak to this person. She let me take home an entire folder of information that she dug up, and it has some of my family history that goes back to 1793, and them moving into this state, the location of their house, how many buildings there were, very close descriptions of where some of those buildings were, etc. I have known these people for nigh on 30 years and didn't know they had that much information about my family history.
Something to consider. Good luck and HH,
Tim