PWS bears tend to be a bit smaller than SE Alaska bears, but you should be able to find a 6 footer with a 17" skull. (The one in the raft is a decent PWS bear.) They also come out a bit later, about May 15 as a generalization. Don't expect any color phase bears, they're all black. I don't know anything about the charter operator you specified but a vessel based hunt is really the way to go in the spring, I just hope his vessel is bigger than the one above!