Miss Moore is wearing a slightly modified version of the M1912 campaign hat, which was standard issue headgear for the Army and Marine Corps from 1912 until about 1940 (still worn by Army drill sergeants and USMC drill instructors). And her bolo tie is the cord worn on the hat-the cords came in different colors to indicate branch of service -- Infantry, Cavalry, Artillery, etc. Due to the dark color I'd say this is a red Artillery cord.

Look at the quality of the fabrics. The tent, the uniforms, the ropes of the tent, the early sneakers (part fabric, part leather). Causes the hair of the shoeshiner (Mrs. Harris?) to stand out, as well as the bolo tie of Miss Moore. What a well-built broom! And is that a paper bag hanging inside the tent? What else could have a square bottom like that?

Their frocks appear to be the uniform of the day, but it looks like they brought their own footwear.

Oh!! More lovely ladies!! Lookin' good for both being 110 years old.