We did the helicopter/glacier trek,and they did ask each of us our weight,but did not weigh us.Then they stragically placed us in the helicopter! It was awesome.
Did the float plane which had no restrictions,but Michelle did ask us our weight,and she placed us accordingly.
I put on around 30 lbs this year,so I was very self concious about this,but once you get up in the air,you forget very quickly,its so beautiful! Dot