Hello all, I am new to this board, from Salt lake City, UT.

I have a question concerning which tartan I should wear.. My Grandmother on my fathers side is a Buchanan, but my surname is Luke, which is a sept of the clan Macdougall. I want to get a kilt in my grandmothers tartan, because she is the one who has talked so much about Scotland and got me interested in all thing Scottish a long time ago. But would it be more proper to wear the Macdougall tartan? Or does it really matter? I know there are several general tartans I could wear but I really want to wear one from my ancestry.
Thanks for any help you can give,

Luke