I don't agree with the warning about Active Pass at all. It is probably the safest of the passes around and there is lots of room for ferries and sailboats to pass. Just stay to the right hand side of the channel, look in front and behind you and listen for the whistles. The currents are only a problem if you can't read tables. I've also frequently seen orcas coming through the pass and that is usually a highlight of our trips if that happens.
Personally I love going through Active Pass.