Over the last few years, upperclass Mids advised that a state flag isn't a required item. However, most Plebe Candidates have one. (3x5) They hang them on the wall outside their door (depending on company rules). Our state Rep. sent us one that flew over the Capital building on the date that Indoc begin. We then took it to son on Parent's Weekend. It was hung outside his door. They are used for spirit missions sometimes but son said that if a certain state is needed, one can be found/borrowed. Don't be shy about contacting your state Rep. with the request.
I regret that I cannot recall where I'd purchased our KP flag. Its white with blue lettering. I believe that it was from one of the Parent Assoc. Chapters but that they'd run out of stock.