I live in Atlanta, my first thought, reading this, was "Ah I wish I had known, I could have told her that most of Atlanta doesn't wear trendy items".
Then I realized... you really have to understand Atlanta, to know what to expect, or to wear if you want to blend in.
Atlanta doesn't have a cohesive metropolitan city vibe, like New York, or LA, or Miami - Atlanta is a very specific and sharply defined group of geographical communities and social tribes. Our clothing reflects this.
In Atlanta, your clothing broadcasts your location or your tribe. You can look at someone and pretty much know where they're coming from: Midtown, Decatur, OTP (although these are a ton of suburbs that all have their own styles as well), Buckhead, Downtown, Little Five, South Side, Tech kids, Georgia State kids, etc. Or the dress indicates your tribe: the film industry community, the theatre/dance community, the hip-hop industry, the drag community, the fetish community, the Latin dance community, the jazz community, the artists, and the young, starving artists, the African-American cultural community. There are a lot more tribes - these are the ones I hang with. A lot of these groups overlap.
There are practical considerations as well. Atlanta is consistently 87+ degrees fahrenheit indoors, and 65-68F, constantly-running AC indoors. I dress for outdoor temps, and I bring my knit zip-up Wolford jacket with me, everywhere I go. Cold shoulders or cropped pants, aren't practical here, except for brief windows in the fall and spring, when outdoors and indoors are consistently temperate and more evenly matched.
So...getting specific for your visit...you are coming from this very stylish community that is kind of its own tribe: the YLF demographic seems to be mainly 30-50s, somewhat conservatively-dressing, mostly-Caucasian North American women. So something like flares, are really only going to be seen in limited groups: Buckhead ladies-who-lunch, maybe John's Creek, and the African-American cultural ladies. If you're among these women, you're gonna blend.
But why the need to blend so thoroughly? Atlanta is all about diversity and creativity, pride and ownership of who you are. You should strut around in your stylish clothes like you own the city. If there's one thing Atlanta appreciates, it is personal style.