Gambler here. A good one? I'm a great one about 45% of the time (haha). But seriously, no, you will likely not find a site online that takes this kind of future bet at this time. Mine will not, I just looked to make sure. As a long time gambler, I am not surprised at this line, but I would take the Vols for about 3 times my normal bet size if I could right now. Vegas knows what they're talking about. Utah State was 8-5 against the spread last year (we were 5-7). This includes a win at USC (say what you want about that win).
So, I am not saying that line is correct. I would bet heavily on us right now. But I am not surprised and, as someone who has lost plenty of money gambling, Vegas knows what they're doing.