Maxine, just for simplicity I'll lay it our very simply:
1) Before you arrive get a mail forwarder and an address.
2) Be watching for a van/RV to buy. With luck you will fly in and buy it that day. If not you can rent a motel there and search Las Vegas till you find one. No point in driving back and forth.
3 I know nothing about foreign banking but you will need some way to buy the van and it needs to be cash, credit card or a check on a US bank. Either open an online account with a US bank or open one as soon as you get here. If you open it when you get here, there may be a hold on the funds and you can't buy anything tell it clears.
4) Do you need a Nevada Drivers License or will your International one do? If you don't need one, don't get it. If you do need one, go to Pahrump and pay for a month at an RV Park, then take the receipt and get your Drivers License.
Bob