It has been about 10 years (before permits) since I have done this hunt.... but when we did it, we rented a cabin in town, a suburban and a boat. We had good luck finding bears from the boat, both cruising the beaches at low tide, and posting up on likely looking grass flats at the heads of bays. This doesn't have to be a hardcore "wilderness" type hunt to be successful, but you can sure make it that way if you want.
There were lot's of rental places right on POW for regular boats.... not sure about inflatables, but it would likely be cheaper to either fly to POW on a regularly scheduled flight or take the ferry, and then use the road system to get close to where you want to go....put the boat (inflatable or otherwise) in at any of many access points and then use the boat to get to your preferred camping / hunting area.
Keep an eye on what is private and what is public though.....