Having a BBQ in a couple weeks and we were thinking of smoking pork butts. I have a Masterbuilt 30" electric smoker. I saw some butts at the store that ranged from 4-5lbs. I was thinking of doing two in the smoker at once. Does anyone have any tips? How long should I plan on having these butts in the smoker? Should I switch their positions half way through the smoke (should that matter)? When you smoke two separate butts, does it take the same amount of time or do you need to double the time? I plan on using a mix of hickory and apple wood chips. I also have a nice rub I found in a book I have. Thanks for any help you can give me.