When we practice inside on wrestling mats here in Columbus I am often barefoot, likewise on good grass. Traction is actually better barefoot, and you learn to keep a mind to your feet better--as others suggested, be sure to pay attention to improving footwork. But I do wear my Sambas (indoor soccer) on some rough places and others wear wrestling shoes or just whatever....I would wear steel toes for full harness fighting though.
best,
Keith
Yeah, I think that barefoot would be great because it is very quick and light, but you would have to coditionyour feet to that though.
I'm more partial to the historical footwear, because isnt that what its all about?