jim8flog
Journeyman Pro
I would still think it was illogical to take driver a club that you would only use for 11-14 shots and then be limited to only 2 other clubs.
Getting to the green in 3 would still give you a chance of parr and a bogey would be a good score for this comp.
Where I play 15 of the holes you could happily play/need to play the tee shot with a driver (albeit going down the grip or hitting a punch shot on a couple) the 3 remaining holes are par 3s where you would be covered by the your choice of iron.
Having said all of that I have never come close to winning one of these because we play them as a stableford. I reckon if they were played as handicap stroke play I would stand a better chance.