This is my first year tournament fishing as a co-angler in BFLs. I have had three tournament now. Two of them I did well and one I zeroed. The two I did well in I fished my strength the one I didn't do well I tried to chase what my boater was doing. My advice is find something you have confidence in for that day of fishing. plastics, cranking, lipless, spinnerbait... whatever it is, don't put it down... my example:
first tournament I prefished and we caught a few on a jerk bait. Tournament day my boater was throwing the A-rig all day I threw my jerk bait I had success with the previous day. I caught 4, finished in 30th.
Second tournament, I prefished and caught some on a chatterbait. Tournament day my boater was on a lipless pattern. I put down my chatterbait and threw the lipless all day caught small fish behind him and zeroed for the day while he got a check.
Third tournament, I was on a plastic craw pattern boater was on a senko pattern. End of the day I was within one pound of his weight, I came in 9th co-angler and he came in 11th boater.
so prefish if you can and find something you have confidence in and use it all day long