I'm using an adapted called an ice-kicker. It has a free-spinning cross bar that helps prevent your auger from falling through the ice, if it falls out of your chuck. On thin ice, your auger can still fall through, however, so you can put a couple holes in the ends of the cross bar and attach a bungee around your drill, so the auger can't drop.
If you're using an 8" auger, make sure your blades are sharp, and make sure your drill can generate over 300 in lbs. of torque, or you'll get nowhere. I let the weight of the drill do the work, and don't press down. If you press down, you stop the drill, and you get nowhere.
Also, take a 12 - 19 Ah motorcycle battery, and make a cable with 12 gauge wire that you can attach to the + and - connectors on your drill and the battery. Carry the battery in s a small bucket, and you're drilling holes all over the place. It may sound like a lot to go through, but most of the work is in the setup, and it costs a lot less than a commercial power auger.
Good Luck - I might be able to help you troubleshoot, if you have problems, but your main problem is likely to be dull blades or underpowered drill.