Are they tame adults? Have they been handled much? Do you have a horse trailer? how big an area are they in? If you have a trailer then back it into a corner where you can use the door as a third wall. If you can bring corral panels that is even more helpful. Ideally..... and note i said ideally..... you want to walk them down the fence line toward the boxed in area and when you push them in use the gate of the trailer to herd them into the trailer.
Next option ... take a black thick sock, cut a small slit in the toe and turn it inside out on your hand. Pin the emu against a wall and Grab the emus beak and flip the sock over it's head and down the neck so the beak goes in the slit. This helps calm them down, then stand behind them and grab a wing in each hand and steer them into the trailer...... Watch for kicking feet.
Option 3 - bring two extra large dog carriers , place feed in the back and when the emu goes to get it slip his head and neck inside and keep backing up with him, have someone from behind push while you place carrier on ground and keep pushing till he's in..... seriously people say they fit, although I have never done this method.
Option 4- If you can easily pick up 125 lbs, come from behind the emu, bear hug him and lean back while holding him up and back against you. Watch for flailing legs. Walk him to trailer and have someone shut the gate while you give him a small toss in.....