I think your info is incorrect. The hotel is the South Point. The track is the Spring Mountain track in Pahrump. Tickets are 599-999 depending on head count and track participation.
Lots more info here:
Shelby 50th: Buy Tickets and General Discussion - Team Shelby
Hotel info:
Shelby 50th: Las Vegas Hotel Details - Team Shelby
Lots of other info in the forum where these topics are
Shelby American 50th Anniversary Bash - Team Shelby
Track rules and safety equipment requirements are there too. I was going to go (even had my ticket) and decided that trucking the GT across the mountains that time of the year is just too risky. Plus I'm pretty sure I won't fit in the seat with a helmet on. Gonna test that though.
Cobras are allowed on the track but no passengers unless you have two roll bars.
Good Luck.