Hey - I need some advice from the pros. I'm cooking on a Chargriller Pro
with an offset fire box. When I cook a butt, I usually shoot for about 7.5#,
and with the right fire, it usually takes around 8 1/2 - 9 1/2 hours, +/-.
I've been asked to smoke a couple butts for a neighborhood party next
weekend, and I think two of 'em in this same size range should be about
right. I've never cooked two at the same time, and won't have a chance to do
a dry run. I'd appreciate any thoughts on a couple questions -

1) How much extra cooking time should I allow, considering I'm cooking two
butts rather than one?
2) If I get nervous and start too early, is there a preferred method for
keeping the bbq warm after I chop it, without overcooking it or drying it
out?

Thanks for your help,
~OC~