Flying to Las Vegas in August

Hi guys, I'm seeking a little advice from you Las Vegas locals.
I'm going to be traveling to Las Vegas, from Illinois, this August and want
to fly my Quickie Q-200. I have been there before, but not in the dead of
summer.
What can I expect? We're going to be there about four days. Is it possible
to find shade to park? Any personal density altitude experience? Would we
be better off flying commercial?
Any input would be very helpful, Thanks very much
Sam Hoskins
http://home.mchsi.com/~shoskins/index.htm