Depending on how much wood and how energetic I feel I'll saw to length using a bow saw or a chain saw. If you're concerned about chain saw oil in your wood, use canola oil or biodegradeable bar oil.
I always cut to length and then split later. In my case, since I'm using chunks in a WSM, length is 3-4" long. In the chain saw world, what I cut are called cookies and they split real easy with a 3/4 axe.