I find the liquid cement dries slow enough that I paint both halves with the stuff before sticking the hull sides together and clamping. Sailing ships are actually easier in that the keels provide a good clamping surface. After the cement has set, I then inspect the seam to find any weak areas which I then touch up with CA. While I have heard of folks having to use epoxy, I have never had to resort to that myself. Be careful what you clamp with, but clothespins or plastic clamps seldom damage fine detail. Metal clamps may, though.
In order to use wooden clothspins, I cut the ends off so that the remaining pin clamps right at the mouth.