I've recently acquired some information on my Walker line & am quickly building on that. Also, I received an email from my Dad's Cousin today letting me know that she has 2 note-books on our Walker line so I am very anxious to try to get most of that info. It seems the Walker line is very Large & spreads throughout the US, mainly southern states.
As for the Pinkney line, it was way back & I have a couple of generations partially in the tree. It comes off the Presley line, which is my Great-Aunt's daughter's husband's line. It was so far back that the information is vague at best.
We might find a Walker connection there - it's possible. Distant is better than none, especially for people who, when we first read each others posts thought our trees were totally unrelated. :)