Well I did try to go to where the boat should be with Han in the fort without fighting the Houndmaster and he wasnt there. So maybe there is something else that triggers the Han event or that removes them, maybe a timer or killing some magisters.
For example, I bypassed the event of Atusa and to enter the fort I went in from the main locked gate by killing the hound and 2 guards, I also killed the patrolling guard with his hound, but once inside Han and the 2 magisters werent there.
