Well the mule was supposed to be for the railyard group to move around. If necessary, Keri can of course move the entire<em>ship</em>, though that might blow their cover as good as letting the levetts escape. Lacking mobility, Lance's and Braxton's (and whoever else is coming) best chance is to surprise the Levetts somehow. They are still observing, so it might be possible to get close and take them out. Alternatively, a dead eye with a rifle might be able to take them all down before they escape, firing right out of the hatch, though that would require some damn fine shootin'.