You are hauling gear, you are hauling bags, totes, reflectors, lenses...all this STUFF!
So what do you wear that fits the criteria of photographer and sophisticate simultaneously?
I once heard a wise photographer say: "look like a guest at the wedding who just happens to have a really nice camera." While not everyone can manage it, I wear heels and frequently a dress. I wear some bling, but nothing too distracting. Basically- I am a professional version of ME.
I wear heels most every day, why should I stop when I'm working? Why should I be expected to done work shoes and cargo pants just because I'm shooting a wedding? People should never have that "there goes the photographer" look written on their faces.
Be clean, be savvy, be yourself.