If you've already seen much of southern Utah, you might want to go to New Mexico to see something new. New Mexico may not have as many photo opportunities, but if you were to search out some nice long hikes in the area, you could probably keep yourself occupied for a few days. It might also be fun to photograph some of the houses down there.
Edit: Oh and I should probably mention that I'm from northern Utah and we have some snow up in the mountains right now. If there is snow in Moab you could get some interesting photos, but I kinda of doubt there will be snow. It's been a pretty dry winter. You should call the visitors center in Moab, and see if they expect there to be snow when you go there.