Catcher,
The Vedder is a great river but we have huge problems with crowds and garbage. There is a run of about 2500 Springs(not Kings!) that show up around June and run through August Fishing is hit and miss, and the season opens July 1.In the fall some 50,000 white fleshed Springs show up. They are all yours as the locals detest these fish. We fish floats and wool ties and baggies, but I mainly just fish wool as its a waste to use good roe on these guys.
A guide is a good idea, look up Vic at STS guides. Check out this website http://www.coastangler.com/vedder_1.htm for reports on lower mailnland rivers and a descrition of the Vedder and it's run timings. If you come, good luck, most of the American guys I meet on the river are respectful to the fishery, but if you come avoid the crowds, there are more idiots on this river than I've ever seen.

ML