I would just ask the bride, or have your wife ask her (even better, she can smooth the way). I was maid of honor at my best friend's wedding and she respectfully asked my friend Paul not to wear his kilt. He would've been the only kiltie in attendance if he had worn it, and her family is sorta.. weird... about that kind of thing (crazy I know).

She'll either ask you not to, or be okay with it. I would definitely respect her wishes on it. It is her day.

She might be thrilled. If I was getting married, I would think it a compliment that one of the guests would get so dressed up.