Originally posted by MyUrp1:

Yes, obviously I plan to set up a base and teleporter in the plains once I get established there... and I admit I'm not a very good viking :) I'm mostly a master of kiting, I'm not the sort to burn my boat when I land on shore!

Does using alternate locations to summon a boss work? I assumed that the location the vegvisir provides is the only valid one, but I could certainly use my map to sail to a different one.

Nope, any boss summon altar will do the trick. Not just the one that was provided to you first.