Two things, first I am from Albuquerque originally and June is a nice time to wear a kilt, unless you are marching on asphalt.

Second and thread oriented, I have a very plain belt buckle that I wear with a PC and Vest when I have to. If I have to wear a dirk or sword, I use the belt to support them. other than that, I do not wear one with a vest or cummerbund.

peace
Piper