"Welcome to Canada," Ken shouted to me over the roar of the rain and thunder. A constant downpour kept the photography workshop indoors. We slipped out during a break in the clouds, but as soon as we set up our tripods, a thunderstorm swept in out of nowhere and sent us scurrying back down the mountain trail to our cars. Since I signed on for this tour of the Canadian Rockies, everything had gone right.It rained sporadically for the first two days of the workshop and we were all a little down. S.