I know that the TV series is roughly paralleling what was in the comics. However, I think if I was in the same situation, I would hightail it out of that prison. The group is outnumbered, is subsisting on a low-calorie diet, is outgunned, and, like Andrea reported to the Governor, they are broken emotionally and mentally. What do they have? Gassed operating vehicles that can get them to safety. And, base on this last episode, the Governor is not devoting resources to containing these individuals, or, otherwise, Rick and his party would never have made it to that other town.
I am sticking with this series to the end of this season. But this series' issues with characters is becoming old hat for me.