I don't compete, but have followed J Minions tips on getting good bark
I now make sure to incude a good amount of sugar, or brown sugar, in my rubs.
And my spray bottle always has something sweet
I get awesome bark
"...Best Buy sucks. They suck it long, and they suck it hard." - JazzyBadger
Bandera, M-BGE, WSM, Gold Kettle, Kenmore Gasser, 36Qt Turkey Fryer, ECB, Dutch Oven