There aren’t endless dark days like you think. The sun always rises and it may only peek out for 3-4 hours on the shortest day but there is still light.
Did you know many areas of Alaska are on or near a fault-line? Alaska has earthquakes all of the time, yes most of the time they are small and not too dangerous at all.
Most travelers hope to see animals such as moose, bears, otters, and whales on a trip to Alaska, however, you may not be that lucky. Sorry, it’s just reality.