"...hot glue would kinda chafe..." Sewing the burlap on then fraying it doesn't itch. Burlap can itch by itself though.
I'd use any cotton coverall and sew assorted coloured burlap(burlap takes dye well) strips on and fray 'em.
There's a how-to here. It's not a one weekend project.
http://www.makeyourownghilliesuit.com/