I went to the 2003 Tall Pines Rally, and it KICKED HUGE BUTT! I had an amazing time...
If you do go, there's a viewing area with BBQs and a helicopter tour and about a billion people standing on the inside of the corner (sorry, don't remember the name of it). Instead of standing there, walk back up the road about a km (opposite to the direction the cars are going), and get up into the trees. Much less people, and you can get a better view.
The spot we picked last year was at the end of a straightaway with a sweeping right hander as they went out of site. Cars were approaching from the top of a rise, and some of them got air under their tires. Just amazing.