If your line is in the water then it's always worth it. ;D The crowds on the Vedder are pretty tame compared to fall. One reason is, most of the masses have gone over to the Fraser to participate in the summer havoc. Usually by the 2nd week of July things are in full swing. You'll get company in the usual runs, but if you're willing to move around a bit there'll be pleny of great water to fish. All depending on water levels of course. 
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