I think it's going to largely depend upon the practitioner and how they perform what type of procedure. My dentist did the lower all-on-four and installed a full apparatus the same day. I had six upper implants done at the same time, secured with a handful of sutures under a temporary plate. Due to the light and porous nature of the bone in the upper, dentists will usually do the implant, put in a healing cap, and suture over, having you come back a few months later to "uncover" and install larger healing caps, but I've heard some dentists don't suture or go straight to the larger caps (seems like bad news, if you ask me, as even micromovements can extend your healing time. It takes 3-9 months for proper osteointegration, but if you're sutured closed, I don't see there is any problem.
I didn't smoke a cigar for two weeks, but I had a pipe the next day. If you're concerned about it, you might ask your provider for a script of Peridex (chlorhexidine). They shouldn't have any problem handing it to you (they may without you even asking), and if you wait an hour or so after smoking to use it, it really doesn't taste bad (just don't rinse or eat for a half hour after using it...it tastes great until you try to rinse it).