I think you can do anything you want before or after the rally. I would hate to see a high speed event as part of the official Rally.
I would have to review my position regarding supporting and attending. Another event like Saleen's at Rally II is fine in my book.
Just learned that there was a crash at the SHELBY BIRTHDAY BASH in Vegas this weekend.
Damaged sheet metal brings a dark cloud over an event, an owner hauled off in a meat wagon is the last thing I want to see.
The Silver State run is in late September :-
http://www.silverstateclassic.com/318-hwy-event-description.htm
Click the link and see the requirements and details.
At the Vegas Motor Speedway there is the Richard Petty Driving Experience where you can run a stock car.
There is also the Spring Mountain Track in Pahrump that offers various programs.
Unless you have a current FIA, SCCA or similar competition license you will not be allowed to run hard on most tracks.
Check out the current issue of CAR & DRIVER which features PEAK COMPLETIONS FGT and other car making bonzai runs.
Notice they all had pro drivers, ever wonder why? Sorry I am not being flippant, just concerned that we remain sane.