Can my SGL roam around popping huts for a few turns without the fear of popping barbs?
I wouldn't risk that... An SGL is worth up to 1000 shields (ok, in the early ancient age you are probably better advised to invest it into something like Pyramids or Artemis, so it's 400-500 shields), losing that would be a major catastrophe... Even if you don't pop barbs from huts, you can always run into them (which usually happens, whenever I send out a settler without escort... )