Less than 50 ??
I think, I think, Secession in Beaufort, SC has less than 50. Several holes have none (#7, #8, #14, #15 ) and there are no bunker clusters. Holes #2 and 13 only have one bunker.
I enjoy play there. When the wind is up, you do have to tack around the course. Most greens are open in the front, and it plays fast and firm most of the time.
The 17th is a starkly different hole, and all unto itself. If you are counting, this very small island green has no bunkers.