I was within shooting distance of several qmule deer does when elk hunting, so I guess it is possible to shoot one without concentrating on mule deer. That said, there are far more experienced elk and mule deer hunters that can give you the pluses and minus of trying for both on the same hunt. I posted to point out Colorado is a draw for mule deer in all units and many southern Colorado units are draw for elk too. So, you'll need to plan a unit you can draw for both or plan to otc elk and draw mule deer.