SW --
I think the region seeding takes precedence, but if two teams with the same seed (two #1's or #2's, etc.) play each other the "H" in the bracket decides who hosts the game. That's my take on it, but I do know first hand that there is some confusion on this, so don't take my word for it. JI actually played Wando better at Wando, and beat them at Wando last year in this same semifinal game to eliminate the Lady Warriors from the playoffs. I don't think the home field advantage here is that great. Go Trojans!!!
lpaf