Questions regarding vet med rv passes

This is our first year for tailgating RV style and was curious as to when the passes are mailed out. Another question..Do you get the same spot each game? I talked to some people last year..they said the spots were respectfully "saved" for those who have passes to every game. Last question..are the rv's facing north/south or east/west or in random positions? Thanks in advance for your help! GEAUX TIGERS!!!!