Every location is different, but I've been having real good success with the AJ's Beetle eater traps I bought from Dadants... tried the cd jewel box traps last year, didn't get but 2 beetles in one trap in one of 14 hives.
I put the AJ traps, 2-4 per hive, depending on size of hive. I check every week or two, and so far the beetles have been kept down to maybe 4-5 in the worst hive. Some of the traps have to be cleaned out regularly. I use mineral oil in them. Nice to see all those drowned beetles!
FWIW. Your location and methods may vary.
"If all you have is a hammer, the whole world is a nail." - A.H. Maslow