Matt
Racing is racing - think you'll find there's no more room or time at Calga than at Crits.
I think what you really want is to put yourself out there & ask some questions / get some experienced riders to show you the ropes.
You'd be surprised how helpful/friendly fellow cyclists can be - maybe you could move yourself in the bunch rides and talk to a few different people until you find what you're after.
This is certainly how we used to do things anyway - like most things in life "you don't ask, you don't get".
The one thing I would advise is to get some pointers from more than a single source (so you don't end up being blindly led by the blind).
If you really want/need some "official" courses then they're out there already - it's up to you. eg.
http://www.impactcycling.com.au/index.php/topic,1772.0.html or http://www.impactcycling.com.au/index.php/topic,1779.0.html
What we don't want is to make these things compulsory - isn't it great that you can actually start racing without going through too many hoops?
This is the best advice for anyone new to racing.
Start in a grade that matches your skills and follow Grant's advice before moving up to the faster categories. This has worked for years as a safe tried and true method, as what advice works for 1 may not work for you.
RE: the event timing, Dan has kindly offered to sponsor, it's his toy, race his dates.