Should I create a 'Live' eMMC boot image?

I have a BBB that can have its power removed at any time (sigh). The board will be booting from the eMMC using an Ubuntu 12.10 (Qantal) image. Should the image on the eMMC be a normal boot image or should it be setup as a ‘Live’ boot image? I’m concerned about corrupting the filesystem on the eMMC.