My Danforth 12S has been flawless. Here in BC it is similar anchoring conditions to Alaska I would think. Deep and limited ability for scope.
I think it is more important to carry more chain vs a heavier anchor itself. Even send down a kellet on the rode where you expect holding to be marginal. I had 30' of 5/16" chain up until this last cruising trip I added another 26' so I now have 56' of chain. In the mud, the Danforth sets really easily and almost completely disappears under the surface. The bonus is that it weighs hardly anything compared to a Rocna or CQR.
A lot of people around here also use Bruce anchors, but if I were to buy a second type it would probably be a plow type like a Rocna or Delta.
