May I provide a counter point to the Rick's team leaving the prison? It has decent fortifications. And those fortifications can be improved. In order to get into the prison the Governor's team (arguably) has to cross a significant amount of open space. While numerically inferior Rick's team has significant zombie/human killing experience and presumably won't crack under fire. Alternatively, the Governor does have some pretty decent people on his side - but how good are teenage boys and arthritic women (hyperbole, I concede). That is where the bulk of his people are. If you take the position he won't include them in an attack then I think there is far more parity. Why presume an assault on the prison succeeds rather than breaking down? And what do you then do, shoot the people who run away? How long will the Governor's little town survive? The other thing which we can take into account is the internal struggles that Andrea and Milton are having - how will that impact taking down the prison? I would suggest the idea of running, while tempting, is fraught with more risks. Who knows who or what you run into next - or where you breakdown? Stay and fight. I think it is worth it.