Make sure the W2 is somewhat clear- runoff from the mountains could make it very muddy.
I drifted with a friend approx. a month and half ago and we used the wee warts. Did not have any success due to the fact that we were not diving low enough(with the use of the wee warts). I would suggest trying a plug that dives a little deeper (wiggle wart,hot-n-tot, etc.).
Good luck!