Sam,
Jolee continues to improve & each days improvement makes another Alaska Cruise next year more likely.
We too have found our encounters with grey & humpback whales in some settings, perhaps best said, unsettling, but very close, especially right under the boat in thick fog, all alone like you it would be especially so. In the C-Dory we have had more very close encounters with the humpbacks then greys, though with the greys in our experiences being maybe more spooky due to their being in the waters on the outside of Chichagof Island & very close off shore as we were entering & exiting remote harbors & passages, sometimes in fog or rougher water than preferred.
As for motors off or on in conditions where that choice can be made, we left them on at idle, hoping it would give the whales another reference point of just where we were in relation to them. It's certainly a heart rever when you look down under a small boat & see only the dark surface of a whale underneath.
Our all time whale experience was during a Alaska & Canada trip exploring remote areas in a 12.5 foot RIB. While approximately half way between Skagway & Haines, Alaska we had a humpback whale raise up with us positioned in the water between its back & tail & could almost look directly into the blow hole as the tail entered the water on the other side & slipped underneath us.
Jay