Hey,
If you wish to shop in Nevada, you will have to be hired by an MSC. There is no work for a shopper in that state as an Independent Contractor.
You will have to register with the Private Investigator Board and get a card to be eligible to work. Depending on when you're going, you could get this card before your trip. It's $100 for 5 years. So if you can make $100 during those two weeks, you've got it covered!
You will need to find companies that shop in Nevada and go through the process with them. I know ACL does that, so does HS Brands.
Hope that helps!
xoxo