I agree no float plane. We normally use the Princess excursions, however I have been reading post by others that have used local outfitters with great success.
Our main interest is to see the local area, countryside, in each port. I am also considering a salmon fishing experience and perhaps whale watching (if it is the season, I am still checking that out). We were wondering about the walk on a glacier tour and a local train ride. No dog sled rides for us.