There is a valid point to be made that Arkansas is hostile ground and shouldn't be taken casually, but for crying out loud the bulk of this team played at Alabama last year, Tech/Ok St/West Virginia, the Sugar Bowl last year, Michigan this year - they are used to high stakes games, games with intense crowds, and games where the local team has hate that isn't reciprocal.
Let's not forget that the team rallied around the "farewell tour" last year, embracing the chance to get scoreboard on the entire conference. They remember the last time Texas played at Arkansas. They know what is at stake for the SEC championship and playoff berth.
I have no idea what will happen on Saturday. I hope they play well. I expect they will. But if they lose it'll be because they played poorly and not because they were blindsided and intimidated by an 11AM Arkansas crowd.