Life on the Mississippi! Welcome to my fathers homeland, we settled in the area south of Clarksville, the next town down from Louisiana, sometime in the 1840s or earlier, coming from Virginia and still have the farm so I feel deeply connected to the land around there. I hope you had a chance to drive through the hills south of Louisiana that trace the river, they are quite beautiful. Clarksville is a sort of smaller,
relatively speaking gentrified version of Louisana, with a broken
skylift. Louisiana definitely has a touch of the rural decay, although the entire city is in much much better shape than a few years ago. The last time I saw the following building in the middle, the top part had partially collapsed..and apparently took park of the neighboring building with it which they have thankfully repaired. I'm pretty sure I have a picture of it on my parents computer up there.
You are right, the area north of St. Louis along the Mississippi contains many people with southern accents, as a good proportion are originally also from Virginia or Kentucky. The onslaught of Germans, Irish, and so forth did not deeply penetrate the Mississippi Valley out of St. Louis perhaps to the extent that they did west along the great Missouri Valley and the other areas of the rural midwest away from the river - probably because these areas were already settled. You will begin to find rural black folks starting at least as far north as Louisiana co-existing, more or less, with the rural white folks...it really is in some ways a lot like an island of the south than a strictly midwestern geography...so ironically north of a northern style metropolitan region.
You also entered the Lincoln Hills, which is essentially a long skinny island of the Ozark uplift that partially escaped the glaciation of the immediate plains to the east and west.
http://www.greatriverroad.com/lincoln.htm
I hope you enjoyed your travels in this area, I'm thrilled you photographed it!
You ever heard the California gold rush/migration song Sweet Bessie (Betsey) From Pike? That's the Pike County.
http://www.contemplator.com/america/betsey.html