Venice's not actually as unbearable as the hype makes it sound - yes, the main squares get rammed, but the moment you wander even 2-3 blocks into the smaller calli and campos, you're basically alone. I went in early November a few years back and hit this tiny campo with a single café where I sat for hours with maybe 3 other people around; the vaporetto lines were short, the basilicas didn't have crushing crowds. The real lesson is just don't stick to the St. Mark's area thinking that's all Venice is. If you're flexible with dates, November is solid - weather's fine, prices drop, and you get actual Venice instead of the tourist gauntlet.