Welcome from Waco. Here are a few places that a kilt is very welcomed. Also, check the Texas events forum. Kilt nights are organized from time to time.
The Sherwood Forest Celtic Festival is coming up Sept 24-25 near McDade, TX, http://sherwoodforestfaire.com/celtic-festival/ :
Austin Celtic Festival Nov 5-6, austincelticfestival.com.
Salado Highland Gathering Nov 11-13,http://www.ctam-salado.org/Gathering/Gathering.htm .
BD