Now, the wagon... I wasn't sure what she should be pulling until after she was completely done, but I settled on this as a way to convey her fortitude and emotional capacity. The wagon itself is a slapped together vessel with weird 'wooden' slats of all shapes and sizes, and rickety wheels helping it to teeter along. But the contents are all manner of little treasures I had collected while growing up, and I borrowed a few from friends who had done the same thing as kids. This was stuff like part of a honeycomb, a skeleton key to nothing, a cartoon character plastic ring, a broken light bulb, etc. To me, these things say, yes, this rabbit is a little crazy, but she also, for whatever reason, holds these things very dear and has plans for them in her (and the baby's) future.
I wish I had a few more detail shots to show you inside the wagon and some other views of momma rabbit, but this one is no longer mine so you'll just have to settle for my description.