Hey, Mark. For your next rib cook I second most of what Ron says. I use my water pan (you can foil it to make cleanup easy, but I don't) and fill it with warm water up to about an inch from the top of the pan.
I don't use as much smoke wood and I use much more charcoal than Ron though. I always use a full ring of charcoal regardless of what I'm cooking. Unless it's a really long cook, I'll have plenty left over for the next smoke. I put two fist-sized or three smaller chunks along just inside the ring and fill the ring with K. I add about half a chimney of lit coal to that (more if the weather's bad).
I cook my ribs 3-1-1, put 'em on the rack for three hours, foil for an hour, then back on the rack out of foil for one final hour. I've never had any doneness issues using this forumla, but YMMV, so adjust as necessary.
Finally, I echo Larry's advice, enjoy yourself!