The drive from Squamish along the forest service road is a nice adventure, but is better suited for higher clearance 2 wheel drive or a 4 wheel drive vehicle. Last year, the road was washed out from all the rains that we had, and impassable. Along the way there is a narrow rock gorge that the river runs through, and it is really neat to have a look at. The road goes through a nice valley, and there are spur roads off the main one that go to some nice lakes, but you have to have a good map to find them. I have been up there when the pinks are running, and at the mouth of the river they are thick, thick, thick.
I can hardly wait til I get my dirt bike, then can head up there even if the road's washed out! If you want to know the status of the road, the guys at Highwater Tackle ( I think it's called that) in North Van on Lonsdale know the skinny.