IMO, nothing to loose by using grunts and/or bleats this itme of year. Just don't over use them. In other words, don't use them to the point that you have deer come looking for the source, don't give away your position by over calling when you have deer near your location.
Deer often times won't respond to calls before, during, or after the rut, but they sometimes will respond. You won't know without trying.
Also, not a bad time to do some rattling right now too.