I've tried lots of meatloafs...homemade concotions and recipes I've found...
I've still never found anything better than the one that uses Lipton Soup Secrets Beefy Onion soup mix.... taken right off the back of the box. It's a keeper especially when smoked.... Nothing fancy - ground beef, ketchup, water, eggs, breadcrumbs.... and the soup mix which is the "secret" !!
You could definitely sub BBQ sauce for the ketchup and add some others...
I also like to melt some cheese on top at the very end.....
Lonestar 24" Vertical offset w/ Insulated Firebox & Performer Platinum
Former owner: Jambo Backyard, Klose BYC, Med. Spicewine, Pitts & Spitts, XL & (2) Med. BGE's, 22" WSM & (2) 18" WSM's, 18" & 22" Weber Kettles