10 flats at once would definitely be extreme! But you could certainly do 5 at once and do 2 cooks as planned.... I've heard of people doing briskets in rib racks, but have never done it, so can't provide any input on that method. If you do that, PLEASE take pic's!!! With the number of briskets you are cooking I think you will definitely have to do 2 cooks or buy another WSM.
To cut down on your time and fuel usage, I would cook the briskets to 165º, foil and finish in the oven. So when you foil, you can just have the other briskets ready and plop them on the cooker. Then when they are done, the ones in the oven should be ready to rest and can be replaced with the ones coming off the cooker.[/QUOTE]
Ok, so here's the update. Turns out we were over 200 people (and there was a question whether we might be at 225 by the time all was said and done). So I went to Sam's and picked up 95 pounds of brisket - seven in total. I then did two consecutive cooks, using my stacker. I put the first three on, including one 16 lb monster, and smoked them at 350 until we were in the 160 degree range. I then foiled those and transferred them to the oven to finish. The other four briskets went on next, with the two smallest ones being propped up sideways on the top rack, with a beer can chicken holder in between them to keep them kind of separated.
All in all it went really well and I got tons of compliments from the group. The one thing I noticed is that the stacker, means you definitely need lots more fire and go through fuel much quicker. I'm sure its a combo of more total volume and more cold meat acting as a heat sink, but I was surprised how it affected the fire, and extended the cooking times a bit. I'm used to 2.5 hours to get a brisket up to temp for wrapping, and this was more like 3.5 hours, and could have gone a little longer if I hadn't been worried about timing.
Larry: I would love to post pictures, but I can't figure it out . . . even though it says I have permission to do so, there is no "photo album" link under the new tab . . sorry.
Bill