Here is Elder Bennion's mailing address
107 S. 1470 E. Ste 104
St. George, Utah 84790
Even thought he is in Ephraim it is best to send it to this address. It will be forwarded to him.
Please only send things via USPS/ US Post office NOT UPS or Fedex.
Here is a map of Utah. He is on I 89 in about the middle of the state.