its a good idea IMO for insurance - uncarbed bottles are a PITA.
you could use something neutral like US-05 or Notty if you like, or the best is if you recently made something with that same yeast strain as the saison and you could put ~TBL of the yeast slurry in the bottling bucket.
only need about 1/2 a packet of US-05/Notty if you go that route.