A few things:
1. You said white stuff just wiped off the leaves... possibly powder mildew, not good. Look into a remedy. It's a very distinct possiblity being you are in the middle of a rain forest.
2. As you know this time of year we are getting a significant amount of dew and it'll continue through your harvest date. Make sure these babies are getting as much early morning sun as possible to dry them quickly.
3. Your days are numbered as far as the season goes. In Alberni you have maybe 5-6 weeks before you are punished by relentless autumn weather... unfortunately you are on the west side of the island, I've seen sunny days in Naniamo when it's pouring in Alberni...
4. We look like our september is going to be a good one, we're lucky this year, once the rains come you are going to need to keep a really close eye or these things will mould up quick. Time to come to terms with a potentially immature, early harvest. These probably won't be "done" until early Nov, we'll be lucky if the weather holds that long. We'll more than likely see frost before that.
Good luck!
Oh, and there is a BC growers thread in the "General Marijuana Growing" forum. Stop in and say Hi.