What I know wouldn't quite fill a thimble, but here it is. It'll be a great time to fish! There should be some king salmon in the rivers of BC as well as some steelhead and coastal cutthroats. A little later on toward August the silver salmon should make an appearance along with increasing numbers of steelhead and coastal cutts.
I'm sure some of the other members can give much greater detail. My only other suggestion would be to check out some fishing guide books on the areas your aiming at and of course, surf the web for info.
World tour eh, what a concept.
Good luck!
Bill