First off, I want to thank all you kind folks here for the education you've given me as I have read your posts and worked my way through some of the archives. As a relatively new Egger, the successes I've had, have come in large part from you all. Thanks![p]Now my question. I am contemplating doing my first Boston Butt. I am just a little concerned over how long a large Egg can hold 190 degrees or so, totally unattended. If you take care to build a reasonably good bed of lump and get your temp stabilized at 190, how long can you reasonably keep the Egg closed and unattended before you might have to tend to the coals or the Butt for that matter?