Columbia River Nooks

Do any of you fish the Columbia near Portland for fall Chinook?  If so, how hard are the tides to deal with? 

Any words of caution?

I have fished for fall chinook in the big "C" many many times but always out of my sled (18ft alumaweld).  Fall fish often run deep (generally 25ft-50ft) and anchoring for them in a yak could be interesting as when the tide really starts pulling there is plenty of current in these locations.  There are more than likely places a guy could fish shallower with less current if you scouted around, but the typical spots most people fish are deep with current. The typical 5x5 rig (five foot lead line with a five foot leader with an Alvin wobbler) could be real interesting when it came to landing a fish in a yak.  The best salmon yak fishery imo is the fall runs on the coastal tidewater/river small water and huge fish.  Good luck