Bring them in on a string. I love this term, if you want to be successful on calling in Elk, try not to just sound like the other caller. We all laugh at each other when we are practicing Elk calling at home or while camping. When I first started calling in Elk, I had no idea what i was doing and it's funny how many I could call in. The biggest Bull that I have called in to date was actually my first. I was making cow calls and screwing it up big time. But it's obvious I didn't screw up at all, no two Elk sound the same and the Big Bulls have heard every call in the woods.
The best trick today for me, is to sound like more than one, so I carry a couple different cow calls and a basic bugle call. The idea is to sound like a small herd or satellite Bull that has snuck off with a couple of cows. Call in different directions and cover up the calls with your hand, be aggresive and don't be afraid of sounding bad. I have heard plenty of bugles from a Big Bull to where if he was in a bugle contest with other hunters around my campfires " he would of lost."