Would it be meta-gaming to move your unit into a region so that you could loot it?
No...
Looting enemy regions is somewhat different to uprooting your family and placing them in an enemy realm though isn't. Don't worry extended family members with young children and wives, even though we regularly call these people pirates and doubt their nobility, I have no doubt you will be completely safe within their borders. This is forgetting the whole issue of exactly HOW you would even get permission to settle your family there, and forgetting that they would have to all select the hero subclass to even do it.
