Everything will be fine right up until the point when you crash and then find out they don't cover any form of track use leaving you with a massive bill!
I just E-Mailed them back and forth, they said as Long as it's legal and non racing, we can bring their rental cars to the track and even the insurance will cover.
I've used rental cars at the 'Ring many times. I've read the contract, and if they don't explicitly exclude driving there then I sign and drive there. It's not racing, I've had no issues.
Other people may be more conservative than me, I fully understand that.
Thanks Kawasaki! I think it's perfectly normal to be conservative when it Comes to the Ring. I'm just letting you guys know Enterprise might be an Option, but do contact them in advance. Even if something happened you have proof to back you up.