Edit doesn't seem to work. Early season, July. Chinook is the big one. Coho the smaller. Both in the ocean out of Cape Disappointment. The Coho will add #1 a week before coming into Astoria bay for their 1,000 mile run up the Columbia.
Auxillary engine also known as trolling motor is very common in US Pacific Northwest trolling for Salmon. You'll want to mount it where the boarding ladder is located on the starboard side in your case. Not sure that bracket will work for your boat...