Can you get to the post office in Wyoming?
If so, you can purchase a U.S. postal money order from the Post office, and mail it to me along with your bitcoin address.
When I receive the money order, I'll exchange it for cash at my post office.
I'll convert the cash to bitcoins using the BitStamp rate at the time that the money order is received. Then I'll keep 5% of the bitcoins for myself as a small service fee, and send the remaining 95% to the bitcoin address that you include in the envelope.
If you are in a hurry, you can send it Priority Express for $19.99 which should result in me receiving it before noon the day after you send it.
If you are not in a hurry, you can just put a stamp on the envelope and send it regular First Class mail. I should receive it in 5 to 7 days.