We have done both trips. The helicopter trip and walking on the glacier was fantastic. We went with ERA helicopters and were very impressed with the safety briefing and the professionalism of all the staff. Our pilot/guide was superb and a mine of information. Walking on the glacier was one of the main highlights of our whole Alaska trip. We also enjoyed the float plane to Misty Fjords, but we were a little concerned at the very casual behaviour of our pilot. As others have had great experiences with this trip we may just have been unlucky! We also felt that we saw more from the helicopter. Which ever one you choose the scenery is spectacular and definately not to be missed! Hope you have a great time!