I don't think Bridgestone are sponsoring it now as we seem to have picked up several ex-Bridgestone runners.

Is it possible to classify the list by area? National; South Island south/north/central, North Island/south/north/central?

Much of that list appears to be North Island north! Maybe some idea of how many current registered participants/cars would tell a better story. I can be accurate with ours and could guess some others. Our own below is cars. 120 drivers.

Supertourers
NZ V8's
NZ V8 Utes
Super Sixes
Holden HQ?
Mini 7?
SS2000
Pro 7
Suzuki Swifts
Production saloons
Central Districts Muscle Cars
Northern Muscle Cars
Production Muscle cars
Historic Muscle Cars
Pre 65's
Honda Cup
Manfeild Winter Series (about 5 different classes)
Star cars
ERC (Euro) - 1 Arrows Wheels - North Island north/central - 71 cars
ERC (Euro) - 2 AES/TradeZone - North Island north/central - 68 cars
Intermarque Series (Manfeild)
OSCA?
U2K Cup - yet to race
BMW E30 - 2 grids
BMW Open - over 2 litre
BMW Open - under 2 litre
Alfa Trofeo
MG Series
Classic Japanese
Sports Cars
ACEs - slower saloons

Plus - Classic Trials - a great stepping stone for the other race classes