I've done it a dozen times.
A few pointers:
* Check out the new station in Hurricane, it is awesome with two dispensers and a great 3600 psi fill

* The North Las Vegas station at 3333 Losee is easy-off / easy-on the Cheyenne exit
* Write down or remember the 2 digit "training code" associated with your credit card from wherever you do end up filling in Las Vegas because Barstow's training video often does not work
* Barstow's bathroom code is 12345

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