That sounds good to me, Mithalwen. I'd posted something similar to that
here
which was responded to in
here
But that seems a little irrelevent now. However, I don't think it ever says when or where Arvedui's sons left their father, or indeed how they knew he was heading to the north. We could, at the end of this little cave adventure, talk to Arvedui's sons and convince them to go to the Havens with us. Anyone still desiring a watery grave could still go on the ship to pick up the king and company
Either way though is ok with me. We did indeed sign up for such an end, so marching into the snows is cool too.