Possible Changing Spots?

Hello!

So excited to come along for this year's Momocon! (3 time coming)

I was wondering if there is a good spot to change out cosplay and/or switch clothes in general? I remember last year I went to the bathrooms but not only the wait times were long but also...the odor didn't really help.

Just wondering so I don't have to wear the cosplay when I Leave my home and be watched by people through the MARTA and be able to switch out before I head for home or possible dinner plans.