I don't know that he necessarily needs 150 yards per se, what we really need is to keep running him without getting cute, and getting first downs. That's the most important thing; let Willis get his 3-4 yards on first and second down, and then do whatever it takes to convert the first down.
If we can do that, particularly in the first half, it will help tremendously. That's what allows us to wear defenses down in the second half.
If Willis and the team can do that and gain only 100 yards, that should still be fine.
What I'd really like to see, though, is Willis break a long one.