I hope it hits 35,000... That would be brilliant for a Friday night against a team from Western/South Western Sydney!
Fingers crossed but unless there's a really big walk-up 35K+ looks unlikely. Still, it will be a great atmosphere. Anything above 25K at the SFS gives you a good atmosphere.
I said to one of my good mates today who sleeps, lives and breathes the Bulldogs lets go to the game it will be a good atmosphere. All I got was "your big tv and couch" will be just fine for us. This is why Sydney crowds are the way they are, even passionate supporters don't give a rats about going to games.