I'm catering a party tomorrow night (well, my own 40th actually!
) with 67 pounds of meat (3 briskets, 4 butts--what a great way to burn a vacation day!). I got the briskets on about 9 this morning and will throw the butts on this evening when the beef comes off.
I've held heat in the "smoke" range on my 22.5-er for probably up to 18 hours in the past, though I know from other posts that some of you have gotten even better results. It was 39 degrees outside when I started, so I'm certain I'll be adding fuel at some point--perhaps multiple times. I'm counting on about 30 hours of smokin', give or take. My question: Is it best to just keep adding chimneys of hot coals and keep the momentum going, or will I hit a point of diminishing return with the ash build-up (eventually restricting airflow?) and need to disassemble the WSM to dump the ash and essentially start over? If the later is the case, best that I do it at the meat switch so as to not disturb the butts...
Thoughts, experiences...?
Thanks in advance.

I've held heat in the "smoke" range on my 22.5-er for probably up to 18 hours in the past, though I know from other posts that some of you have gotten even better results. It was 39 degrees outside when I started, so I'm certain I'll be adding fuel at some point--perhaps multiple times. I'm counting on about 30 hours of smokin', give or take. My question: Is it best to just keep adding chimneys of hot coals and keep the momentum going, or will I hit a point of diminishing return with the ash build-up (eventually restricting airflow?) and need to disassemble the WSM to dump the ash and essentially start over? If the later is the case, best that I do it at the meat switch so as to not disturb the butts...
Thoughts, experiences...?
Thanks in advance.