This is an opening season (1981) Roaring Rapids male uniform as well as female. Both males and females also had the option to wear the same colored pants in shorts. I could be wrong, but I believe this was the first time males had the option of wearing shorts in the park.
The dark red/tan uniforms are general Food Service uniforms (meaning most of the food stands like Great American Hamburger, Wheelburger, Bandstandza, etc.), the brown/orange are male food carts uniforms while the yellow/orange are female food carts, the dark red with white stripes were for Yum Yum Palace and Gingerbread Fancy. Best of the West may have had these same uniforms, but if I recall correctly, they had a denim uniform jeans with a red shirt similar to ride ops in that section of the park. La Cantina and Goya Taco in the "Spanish section" wore uniforms very similar to those of Rolling Thunder's operators. I'm referring to the 1980, 1981, and 1982 seasons.