Figured out that with judicious use of the super sneak button, my Sith assassin can sneak through Republic bases at will. I wish I could have seen the look on the poor smugglers face when I appeared and killed him in the House Organa cantina.
Now just to clarify, I'm doing this as a lvl 31 Sith assassin. I'm not a lvl 50 just being a punk. I originally was just exploring, and figured I'd see just how far I could get into their base. The lvl 50 turrets are a real pain, but with the super sneak you can walk right by them.
Sadly, the PVP server I'm on has pretty low population, so I rarely see anybody. For gathering however, doing it in the Opposing team's heroic areas is great. They have tons of resource nodes to grab, and the locals are all friendly.