Some good advice on this board. I have had the unpleasant experience of flipping my drift boat on the upper Quinault. A minute of inattention, a hangup on a snag below the waterline, a 90 degree turn, and up against a small sweeper was all it took to put my Willie 16 under. My partner and I tried to budge it while standing in 4 foot of water but the hydro forces are mega strong--more than most people realize. We left the boat overnight in the river and returned the next day with a chainsaw, block and tackle, and comealong, (we had 100' of 3/4 line on board). We ended up snapping the 3/4 line but managed to get the boat out. Forutnately it didn't rain over night or my boat would have been toast. I've had driftboats since '72, commercial fished SE Alaska, and raced sailboats in the "big pond". Accidents can happen anywhere and anytime. I'm much more safety conscious these days. As was said earlier, keep safety in mind and you won't have to worry about how to get your boat right-side-up and out of the river. Be safe out there!
JT