iambecomelife,
Nice idea!
I will tell something related to my experience when I was making the HT mod:
I notice that all ships and mainly Aiuboats that are anchored just have very, very slow movement, so when you arrive to the port after few weeks many ship/aiuboats are in a slight different position. And - here is the better part - if you uncheck that 'Docked ship' box in mission editor, properties, the ship will move a lot (300m) away. I notice that when the ship have some speed (6 knots for example) and hit his last waypont this slow movement is still larger (after some days).
Hopes this help you.
Rubini.