Locust and oak is pretty much all we burn around here unless it's brought in from outside the area. Locust gives off a bitter taste if you smoke with it, not very nice. Not my experience, other friends. If you chip the wood, don't use it in composting for the garden. It has a natural pesticide in the bark.
As far as how long to season? We had a hurricane one year in August, as much locust as you could ever want was blown down all over. I heated with a wood stove at the time. Cut split and burning that December. Very hot, clean burning wood.
Because it dries so fast, watch for twisting and checking in the slabs. A couple of friends decided to mill out a few posts for interior woodworking. The beams twisted like a corkscrew.