100% agree with everyone else: if you can afford it, do the full monty. The first comp I ever did had 82 teams competing. My buddy and me showed up with a Weber kettle and a Char Griller offset with no mods. We didn't even have an EZ up. We had one of those tent pole rain flies. The guys behind us had a $30,000 pull-behind offset stick burner, the dude next to us had a bevy of Big Green Eggs.... everywhere I looked I had grill envy. I had never heard of this stuff before and I asked my partner what the hell did we get into??
We took sixth in brisket, second in ribs and placed twelfth overall.
At the end of the day, just go have fun and don't let yourself feel intimidated. This is one sport where a novice can beat a "pro" any given day.
Pro Q Frontier, UDS (Little Red), "Turtle Drum" UDS, CG Gasser KCBS CBJ#61160