Almost said ccc camp but there is nothing close by to justify the location. By close by I mean highway construction or dam or bridge or tunnel.
To big for tents and when magnified the shapes are to erratic to say migrant workers tents.
There are no signs or traveled paths even from farm equipment to say large hay or corn stock piles.
BUT possibly an old apple orchard
Looking at the lower left pic they all have a reasonable shadow about 10 o'clock. Showing some height to the objects.
I still have to say trees. Apple or cherry trimmed low for picking but spread.
The trees in the field row in both sets of pics have about the same amount of leaves.