FOLKSTYLE TOURNAMENTS
13. Rules Modifications (references to NFSHSA rules book):
Rule 10-4
In the event of a bracket with three or four wrestlers, there WILL be a round robin. In the event of a two-man bracket they will wrestle the best two out of three matches.
I understand that to mean you have to do a round robin on 3 and 4 man brackets. The option is there for doing a round robing on a 5 man. I personally believe you should do a Round Robin with 5 wrestlers.