Re: Long Sessions
the key is to keep the coals moving so everything burns evenly. You can't do big sessions with every brand, either. A lot of SB flavors fade after the 90 minute mark...JM is a good one for long sessions, I've pulled 2.5 hours out of Tangerine. I'm sure people have other favorites for long smoke.
Also remember if you have a few people smoking, your session will be shorter.
Good luck, and give us your best record when you get some good long sessions!