It's a garter snake (haven't had a chance to narrow it down farther yet), and that is a toad.
That's the biggest, or at least widest, garter that I've seen; I'm wondering if it's gravid. I'll try to figure out the species once I get a chance. Time for us to down our own toads, er, have dinner now...
edit: it was an Eastern Garter. I determined this through a long, involved, complex process which involved looking in the field guide and seeing that the Eastern is the only species that's here.