According to this, the official bracket is blank, with no sites.
Unless they've changed it, the NCAA selection committee attempts to keep the top four seeds in each region (with preference going to higher seeds) as close to home as possible. Therefore, at least technically, this would mean the Cajuns (should we win the tourney) could go anywhere.
Now, they may have changed this and I don't know...
https://www.ncaa.com/news/basketball-men/bracketiq/2018-01-09/march-madness-bracket-2018-official-and-printable-pdf-ncaa