Kentucky fans are promising Iowa State fans a 10,000 Kentucky fans supporting them against UCONN. This is much more likely than getting Louisville fans to support us.
I've been to tourney games in the past, once in Springfield when we lost to NC State and another in Philadelphia when we beat Texas A&M. I expected a huge pro-UCONN crowd in Springfield but it was only 25% UCONN and the rest split between Vermont, Michigan State, and Texas A&M.
Given how corporate these events have become and the split in ticket sales, crowd advantage in the tourney is somewhat overrated. However, I do think that if there is a home court advantage, Kentucky will have it.