nice, sounds like you are on your way to a great weekend! Smoking is alot like brewing. "Relax have a beer", or in your case "Relex, have a homebrew". The main thing you need to do is hit your food temp. That's pretty much it. Unlike beer it isn't totally about sanitation. Yeah, don't roll it around in the ash, or do other unseemly things to your food. But you don't have to be as anal about it like you do in beer. When I first started, i cooked to time. I realize now, that you should cook to temp. However long it took to get there is how long it took to get there. Lastly, if you're doing this for a party this weekend, especially with a butt (sometimes you'll get a "stall"), leave at least 4 more hours than you were planning on in the first place. Again, the cut is forgiving, so if it does stall, you can work with it. If it doesn't stall, just foil it, wrap it in towels (not the fancy ones, just the crappy ones. Don't need to piss off SWMBO) and put in a cooler, and it'll still be just as hot 4 hours later.