In ND we use 5 regular season, playoffs and finals.
(I will be WH for a final this year, 3rd final but first as WH.)
Wish we had more than 5 but we are very experienced at 5-man mechanics so we are confident.
My first final 15 years ago was 4 man and I was a wing. I think I collapsed after the game (actually more of a track meet!).