db, welcome to the smokin it club and congrats on the #2, you will not be disappointed.
For the pork butt, I smoke a 10lb butt and it took 22 hours, however every one is different, just like every stall is different. To prepare it, add a binding agent like mustard, the add the rub, wrap tightly then refrigerate. When ready, put in smoker and set to 225. For that size you would need 5-6 oz of wood, if you want less of the smoker flavour, then drop down to 4oz. The meat will only absorb smoke up to a certain temp, therefore foiling when you hit a stall won't make a difference. Most will foil to speed up the cook time y trying to avoid stalls. I also put a small loaf pan at the bottom near the smoke box with apple juice or beer to add moisture to the chamber. Once it hits an internal temp of 195-200, I remove, wrap with foil, cover with towels and let it rest in a cooler for a few hours. You will have a nice bark, yet tender and juicy on the inside. You also have the option to inject a marinade the night before you smoke it.
As for the ribs, as with the butt, add binding agent and rub, the refrigerate. I have done the 3-2-1 method and found that if you leave it in the smoker without wrapping, I achieved much better results. For the ribs, you can refer to my recent post for details.
http://smokinitforums.com/index.php?topic=966.0If smoking both at the same time, simply pull out the ribs after about 5-6 hours.
Good luck and let us know how it turns out.