Make one more rack then you plan to! They always seem to go quickly in my house. If I make one rack for the family, I can expect to have some "visitors" that somehow know I'm smoking. Also, the 3-2-1 method is great, but whenever I did it, I always got fall off the bone ribs. While they were great, I like to have some pull on mine. So, I leave mine in the smoke for 3-3.5 hrs, then just put them on heat (I'm a gasser though), spritzing them down every 45-60 mins with a mixture of apple juice, cider vinegar seasoned with a little sea salt, fresh cracked pepper, light brown suger, garlic and onion powder and worchestershire sauce.
I've never sauced my ribs, but I will be doing 2 racks of bb's for the super bowl. I'm going to sauce one of them 30 mins before they're done so the sauce has time to warm up a little one them and get a nice little crust. As always, enjoy! A bad day of smoking beats out a good day at work.