I agree with you about keeping Carvalho at his original guard position. In fact, Rios played some center against McNeese State. So he knows that position. I believe that when you must gain yardage on the ground, you run your best back behind your best offensive lineman. In PSU's case, the best side of the line will be Carvalho and Heerspink. So I think you can look for that. If it's the right side of the line I think it will help White as well. Rolling to his right and throwing is easier than rolling left. I hope as well that Howell considers the team before his own personal preference. He has the talent. Most interesting is Mark Lucas (D-end, 6'3', 235) going to the offensive line. He might provide line speed on sweeps if he plays. He can block linebackers for sure.
As for the game, I think it will be a lot like the game in Sacramento last year. Sac State had a strong defense, and I hear they are fairly strong this year. PSU's defense will have to match their effort. 17-10 PSU.