Also on brisket, try to do whole slices not the half slices like it looks like you did & fill the boxes w/ maybe enough to give judges plus table capt some. I try on chicken to get a 3x3 box if I can else 8 servings in a 3-3-2 pattern of some kind. On ribs, I try for 2 rows of 4 or 5 ribs each, butt just fill it with a mix of chunks & pulled maybe sliced money muscle if that turns out. Some good ideas can be found on website BBQ Critic.com
I've been in the boat to where I some of the crowd take meat while I was trying to do my box. They just came up watched for a bit then just grabbed w/o even asking. I almost blew my stack over that & instead I just wrapped meat back up & acted like it wasn't fully done & back onto the smoker for a bit as I still had plenty of time. I learned from that that if I'm by myself to have my canopy sides up as that keeps leakers from coming in as I can deal w/ family.