Bagger your club championship experience sounds much like my own.
I played in mine a few months back. It was my first big comp since i started playing golf again, after a lay off while i was at uni.
I hit the ball very well in practice but couldn't take it to the course. Had a couple of big misses to the left and right in the first few holes which destroyed my confidence and ended up resorting to 3/4 punch shots to keep it play. My course sounds much like yours, accuracy of the tee is all important, you can forget about finding it when you hit it in the rough. Just when i thought i was getting it back to respectable the long par 4 9th was the last nail in the coffin. Hit a three wood out of bounds to the right off the tee, then hit a second three wood in the left rough, my third ball followed my second with a two iron. Scrambled a twelve in the end, I certainly had a hard time keeping up beat after that.
It's strange i used to flip it like crazy with little compression, but at least i could score!