Number 1 Oval, Princess Park, just south of Ikon Park, Carlton North Google Maps Link
Parking : Ikon Park carpark, Royal Parade, Princes Park Drive or Cemetary Road West
Public Transport : Tram "19" along Royal Parade - Flinders Street Station to North Coburg
Cycling there is cool too.
Or just turn up on a Sunday... 9:30am during school Term 2 & 3