Your first step is to login to the total rewards webpage. If you are not a Total Rewards member, you will need to sign up to get this deal. It's free and if you are going to gamble anyway, odds are you will end up at a Total Rewards property sooner or later anyway...
Once you log in, Click on Earn and Redeem at the top of the screen. Next click on With TR Alliances also at the top of the screen. Next click the orange learn more bar on the TR Getaways square. Now click on the orange Enter TR Getaways bar. Once you complete this it will take you to lifestylecollection.com This is where you select car, enter Las Vegas for location, enter your dates and your on your way!
Now, I am kicking myself a little because, I first checked this out about a week and half ago. When I logged in today, the price has gone up. I still received a 7 day reservation for $156 final price for a Ford Escape, so I am not really complaining. But use this as a gauge on price, to determine when to pull the trigger. As a comparison, for the same dates and times, Alamo has a economy car for $234 after all taxes and fees. I'll keep checking rates as my dates get closer but I'm happy with the price I paid, hopefully this will save you some money!