I'm not much help on the tires but I am jealous that you're going to CrossVegas. I do a lot of Trade shows for my job(sales) but none of them are fun in any way. This one would be really cool to attend or even work at.
Run a jet and a mud....and the course is grass, deep energy sapping grass. I'll see you at the line.
It's gonna be more fun than anything brotherin, dont get too caught up in the techy crap. Look for the SQUIRT LUBE team throwing out samples during the race....from the race. Out!
We will also be at the Cactus Cup....
Keep in mind that the course in on soccer fields. The sprinklers run fairly regularly there, so you do run the chance of having some nice slick wet spots. A semi-slick might not be the best choice. Maybe something like the Maxxis Mimo, or a Vredestien. Just my 2 cents.