Hard to say. Sugar maple usually has very smooth bark until it gets to about 8-12" diameter, if it grew in the woods. If it grows in the open, the bark will be rougher, but it's usually a lot finer grained than what I see there. The one on the right in the first pic looks like what I've seen, and possibly the one on the left, but the middle looks more like oak to me. The pics of the splitting look like oak to me, and maple generally splits cleanly, since the grain is not cross linked. JMO
Julian