With what seems to be an unpopular opinion. I was treated great as a visiting fan in Tucson last year. One couple thanked us for coming and volunteered to pay for our dinner at the sub shop we were in.
I've probably been to about 30 away venues. Ole Miss and ND were probably the best. Ones I was treated very poorly, Wyoming, Washington, and SDSU (only once out of several times there). Boise, where I lived for many years was no picnic either.
Utah, I vowed to never go there again for a BYU game about 35 years ago. Now if somone wants to offer me tickets to Utes\USC next Friday, I'm in.