My Las Vegas house peak at 112F today, but I am in FL trying to deal with Irma.
Beware that your TC AC will not keep it comfortable at those temperatures even if you manage to get some shade.
Take swimsuits and stay in the pool till sundown.
Circus Circus is clean and right in the center.Beware that the huge resorts look close down the street, but can be miles away. Las Vegas has lot of RV parks, but I doubt you will like to stay next to local fulltimers.
Nice resort is Oasis, but far away from everything.
With hotels, always ask where you can park over the phone as you don't want to pull in front of them and deal with crazy limo drivers.
Have fun.What timeshare?