How's things? Plenty of rain in Van this winter, you sure picked a good time to escape down to SA
Can't comment on shipping by sea, Sandra at Dakar Motos would probably be the best person to call to get an idea if anyone is doing it and what the costs are. From Cape Town to BA by air, the easiest was Malaysian Airlines and I believe that's the case in the opposite direction but I appreciate that with two bikes sea freighting is certainly an option to look into. Safe riding!
P.S. Canucks are currently first in the league.