Have you tried splitting any of that oak? Southern oaks are like northern elms. Very twisty grain that is very challenging to split. I built a hydraulic splitter that attaches to the three-point hitch on my tractor because the oaks we have are too much for these old joints to split!
I haven't. We have a proportion of the twisty stuff for sure but even the straighter post oaks are hard as a rock, slow growth from being so densely packed that they've been competing for sunlight. I counted rings on a couple that were surprisingly (to me) small diameter for being 60 years old. I also have a couple of elms ready to split. Figured I had to at least try it the old fashioned way before I go for a hydraulic...if I can get through one season I'll be happy.