Denny,
I do the bone-in shoulders and butts all the time, and I usually do 2 at a time. As a matter of fact I'm startin a couple of 7 or 8 pounders around 10pm tonite.
I smoke mine at 230 deg. to an internal temp of 195. Then I heavy duty foil them, and pop them in a dry cooler for about 30 min. to let the juices settle, plus this will bring the temp up another 5 deg. or so.
Time wise...it's almost always taken me at least 2hrs/lb., sometimes a little more. Usually between 16 & 18 hrs. (I keep logs)
Great advice about the thermometers. You can buy a digital thermometer for about $16 at Targets or similar store. I myself use one in each piece of meat (not in fat, or against bone). I also use one to monitor my chamber temp. i2BBQ is right, knowing your internal temps will make a hero out of you for sure. Another note: don't leave the thermometer unit itself in the sun, it will destroy the electronics...found out the hard way. I usually leave them in the house and plug in when I wanna check temp, which I do about every hour or so.
As far as smoke, it's personal taste. I use a bullet water smoker, and always place my soaked hickory right on the coals as soon as I start. Never had a complaint about too much smoke, nor a bitter taste. I usually start of with 4 fist size chunks, and usually added more around 4 or 5 hours.
Well good luck with your Q...I'm sure if you follow the advice on here, it will be a big hit. This forum is definitely the reason for my success.
SmoKen