Takes at least an hour or three to smoke, and this is cold smoking so it's really just adding flavor. Take 'em home and roast them in the oven to actually cook them.

I wouldn't bother brining pork ribs, maybe the spare ribs though. Do some googling.

Thinking early afternoon-ish, almost certainly no earlier than noon. Let me know if you wanna come by and I'll call or email when I have a better time guestimate.