I'm planning on sneaking out for a look Smasha, but you'll be over at Fitzroy mate and my mob will be over at Adel Luth.

Not sure what's been communicated to the Clubs, but apparently Adel Luth opposed the early start, so we'll have to do the C&CCA final on a Sunday sometime, with Saturday's match between PV & AL commencing around 2pm.
Summary of the rules from SAMCA themselves, and yes, it's expected that a 30 yard circle be marked on the participating ovals.
TWENTY/20 MATCHES – METROPOLITAN AND COUNTRY KNOCKOUT COMPETITION Summary
The rules of the competition are detailed in this document. The following is provided as a quick overview:-
• 20 overs per team
• Maximum of four overs per bowler
• Overs are to be bowled in five over blocks alternating from each end
• There will be free hits after front foot no balls
• Ovals should be marked with a fielding circle (27.4m)
• The size of the boundary is up to the discretion of the host club/association
• Only two fielders are allowed outside the fielding restriction circle for the first 6 overs of an innings
• From the 7th over onwards, teams are allowed a maximum of five fielders outside the fielding restriction circle
• There is no requirement for stationary fielders (catching men) at any stage
• Tied matches will be decided by a One1 Eliminator