I got that from your statement "the Cajuns could catch LSU in the RPI." The way I'm interpreting it, you are thinking that if the Cajuns pass LSU in the rpi rankings, they will host instead of LSU.
Ok, I'm probably reading way too much into that short sentence. Thanks for more of an explanation.
I overstated my case by using the words "trouble/work" to describe what the committee would have to do if neither LSU nor Louisiana hosted. But the 400 mile rule is one of the factors they take into consideration when they are deliberating between teams who are so closely matched in merits and demerits. Granted, merits usually make a clear case, but not always. I do believe that merit will be very clear as to who the 16 seeds will be this season.