Looks like your fishing all the same water as me. I've fished drift boats and sleds in pretty much all the rivers you mentioned except the Fraser. In the Fraser you really only want to fish from a sled so when you hook one of those big springs you can run him down and than run back to the hot spot. I use to really like using a drift boat but the Nooksack is just getting way too much pressure. If you don't mind having boats all around you than the drift boat will suit you fine but you'll always need a fishing buddy to fish with so you can have another car to run back up river to get your trailer. This time of year if your fishing the Sauk the best way to go is with a drift boat since the regs won't allow you to fish out of a sled but you can use it for transportation. I've had a sled for about four or five years now and actually just upgraded last year to a new Alumaweld. I personally really like running a sled cause I can get where every I want in a hurry and if there are people around I can always go find some quite water away from the crowds. You can also just run out and fish for a few hours if you can't afford to go for the day which in a drift boat your committed to fishing a whole drift once you drop the boat in. I also like the fact I can fish all by my self and quit when ever I want or even fish the upper section and than take the boat out and fish the lower part of the rive if things aren't up to par. Much more flexibility with a sled. I would recommend getting a sled if your pocket book allows it. You need to be a bit more careful with a sled since everything happens a lot fast when your crusing at twenty to thirty-five miles an hours. Good luck on your decision.