1. Definitely
2. I agree that if we don't get a kiss in the first episode, we'll almost certainly get one in the second
3. I'm guessing Waige, because I think they will likely pick up pretty much where they left off S3 - or about an hour or two later
But they could switch it up and give us a Quintis-on-their-delayed-honeymoon scene.
4. I won't be surprised if it's in the open - just a minute or two in.