GREAT answers!!! As a judge, I definitely look for balance between the meat, sauce, and smoke. Too much of any one of these elements will reduce your score.
Lake Dogs has it right as far as differing between KCBS and MBN competitions. Best bet is to talk with teams in the contests your are applying to find out what their experiences are with saucing.
CMJ - KCBS
CBJ - MBN, NCBS, NCPC, NCBBQA
OBJ - BBQCritic.com
CTC - KCBS
Pitmaster and chef - "4 Lil' Pigs" Competition BBQ Team
Author of "A 'Q' Review"
Lang Hybrid Smoker, BDS, Holland "Epic"