I've been doing driving schools for over 10 years. Always drove my street car there and drove it back home. Never a wreak. If your driving your car that far past your ( or your cars ) limits, Your not worried about wreaking it.
I try to drive between 80% and 90% of my ability. Never go even close to the edge. My goal is to always drive my car home. A few seconds on the track is not worth $10k-$20k and my car in the shop for a few months.
Driving Schools are a blast. Anyone owning a performance car, will never fully enjoy what they've paid for, without learning to drive it on a track.
Just do it.
Yeah? what happens when the car in front of you looses its tranny or blows a radiator hose & dumps a gallon or two on the apex of the corner? How about mechanical failure on your car? tire blow out? Driving at 5/10ths wont save you. If you drive on the track , you need to be prepared for the uncontrollable. Driving a viper on the track is adding 30 to 50 mph to the speeds that most cars on track attain, that adds to the skill set required. I give Skip @ Vipers days a lot of credit for his great safety record & I think that his Viper specific program helps keep the carnage down.
Read my original reply, I have had thousands of hours on the track in street cars & it took 15 years & a 27 degree day before I even had a wreck let alone break anything. I did however understand the risks involved & was prepared to write it off if I wrecked. I also prepared my car to the nth degree with proper equipment & maintainence. I have instructed & teched for many a club & I could not believe the condition of some of the cars & drivers & egos you are sharing the track with. I have been in students cars that have lost the brakes in TWO LAPS & drove the car straight into a tire wall(in a 911! ouch). I have been in Vipers with drivers who have told me thay have 9 track days under their beltn & put themselves in the advanced class when they have had no experiance at all. After trying to kill both of us, then bad mouthing the instructor for "making them spin".
The point is , track driving isnt just about you, & if you havent wrecked yet, congrats. But to think that its never gonna happen is wishful thinking.
PS: On my dealing with state farm on my wifes boxster, they came to the body shop the next day, asked for the car that wrecked @ R/A & cut me a check on the spot, the damage estamate was $2900 for the front bumper & air bags, cost me 1800 to fix, then a month later got a check for 700 diminished value, the day I turned it back in to the lease co!
PSS; sont even think about the ole have the wrecker trhrow it in the ditch plan, with the new phone cams, the boxster was on 5 web boards that day!
totaled his heavily modded car & SF paid on the spot. Even though his occupation was race driver. If you can't afford the wreck, you are right to stay off the track. Stick with autocross & drag racing or buy a cheap car to trash on the track. Tracking the Viper is fun, but so is a miata at 11/10ths! Fun on the track equals intensity. If you are driving your Viper @ 6/10th's it feels fast but driving a slower car @ 10/10th's will feel just as exciting or even more so. 
