Just because you're unable to use Google Maps/Earth well doesn't mean that I'm wrong. There are
two Ham Islands in AK—the one you mentioned in the Yukon River and the far more accessible one in the
Alexander Archipelago. The latter is the one I'm proposing for our Island of Misfit Hams DXpedition. There are several reasons for that, one major reason being that IOTA does not recognize islands in rivers.