You're kidding, far more chance of something happening on a TA than on a hill climb.
Tbh matey, unless you can afford to write the car off then you shouldn't try it. Any motorsport carries risks, and as you need to be at 10/10ths to get anywhere there's always a chance that you could bin it. Hell, you get that same risk with a normal trackday, but it's tenfold when you're competitive.
Not trying to put you off, I'm half tempted myself, but don't deceive yourself into thinking that there's less chance of you damaging your p&j.