Just read through all that and don't understand why people think they have to have a cams licence to go to barbs?
If you don't have one just rock up to a test and tune day and your day fee will be around $165
If you do have a cams licence (which costs bugger all really) just rock up and the fee is $50-$60
For that you get pretty much a full day of going mad at a proper race track, thats good value as I see it.
Sure, there is more wear and tear at the track then normal driving but its not really that bad as long as you are only doing a few fast laps at a time and not trying to do
le mans.