I rented an RV for the Clemson game this past season and got to campus at about 8 pm on Friday night. I stayed in the public RV lot (near the duck pond) where it was first come first serve. I got in just in time before all spots were taken. That was the Clemson game though and as I talked to folks around me, they said all other games had plenty of available spots. ND game will be crowded but likely not at much as Clemson this past season.