Well, that definitely looks like black locust now! Either way, it should split "relatively" easily compared to some woods (elm for one). It will still be a good bit of work. If you have a couple of long pry bars, it can help with those first couple of splits. Good luck! You should get some nice staves from that trunk. For BL, I always remove the sapwood and seal the back as soon as the bark comes off. Opinion may vary on that step, but I had bad drying checks develop the one time I didn't do it.