Thanks guys. I wish I could find some more (low-poly for distance) people having a leisurely stroll or cycle ride. They'd fit well in these kind of landscapes. Browsed to find some, but the yield is extremely meagre.
The masks to get the ditches, stream, road, etc. in were quite fickle to paint. Pixelwork, so to speak, as I didn't want to make the layered working TIFF too large. It's already at nearly one gig of data.