Ahh mate that's a bit late there won't be any wind by mid January, I would not bother
Nah just joking due to your to and fro............

you'll have a ball.
I would not commit to Gero as if there is "no wind" what we really mean is no seabreeze, rather an early morning easterly that is unsailable at the beach. If you can, try to have a plan to be able to do a few days/week in Lancelin or Geraldton (if S - SW seabreezes are on) or be able to spend few days in Perth if seabreezes turn to crap you may get 20kn (early) morning easterlies
Or, get a surfboard and then u r happy with wind or no wind regardless of location.