No need for a smokenator!
Just buy some good charcoal - I use Mr. Stubbs, some wood chunks for smoking - mesquite, hickory, apple, cherry, and oak are good to start with.
For a thermometer system I would go with the Maverick ET-732. It has a probe for the pit and one for the meat - great unit!
Another thing you might want to consider is buying some grommets to pass the temperature probes through. There are a couple ways to do this, you can buy the grommets that replace the bolts that hold the rack brackets or you can drill a hole in the side and use lamp hardware for a homemade deal.
Good luck and make sure you take some pics of the happy occasion.
Bill