Childhood entertainment, as we know it today, (aka technology) was not a factor in the 1950's. There was not even always a telephone. So a trip to the mill was Big.
There are no memories of a truck. I think the trips must have happened in his and Granny's black Chevrolet.
There were two mills that I remember, but I don't know why he chose one over another at any given time. There must have been a reason, but asking him now isn't an option.
One was a small mill in a tiny dot on the map called Southmont, about 11 miles from High Rock. You had to cross part of High Rock Lake to get there. I've looked for signs of it lately along Hwy. 8, and it seems to be gone, like so many other small mills in the area. [Nevertheless, I still like to ride through Southmont for the memories, and to view this house up on a hill beside of the road, just because I like it.]
That was a bigger mill than Southmont, and recent ramblings show that not only is it still standing, but also it's on the National Register of Historic Places as of 2016.
You can still read part of the name of the structure from an end view, Richfield Milling Co. It's described as a roller type mill built sometime between 1910 and 1920, depending on the source. A Salisbury Post (Dec. 20, 2016) article described the mill in this way:
"Built near the railroad, the mill served local farmers selling their grain crops for shipment to larger markets and for their own use and animal feed. (https://www.salisburypost.com/2016/12/20/old-richfield-mill-added-national-register/)
The (fuzzy) picture below, taken several months ago, shows the mill in a
state of disrepair. You can still see the checkerboard pattern of Purina Feeds between two of the top windows.
24 Truly, truly, I say to you, unless a grain of wheat falls into the earth and dies, it remains alone; but if it dies, it bears much fruit. 25 Whoever loves his life loses it, and whoever hates his life in this world will keep it for eternal life. 26 If anyone serves me, he must follow me; and where I am, there will my servant be also. If anyone serves me, the Father will honor him. (John 12:24-26)