As you're going south on the I-15 past the Downtown, and then the Strip, you'll see Tropicana, then Russel, then the 215 (Airport). Blue Diamond exit is about 1 mile beyond the 215 exit. As you exit to the right, you'll be heading directly "into" Silverton. Bear to the right, and then left into the parking lot.
If you're coming north on I-15, you'll see the St. Rose Parkway exit first, and then Blue Diamond several (?) miles beyond that.
I don't believe that Jon has ever said that they need to be DOT tires. I'm pretty confident that slicks are fine.