It is also a good thing to remember that weight restrictions for the helicopter/glacier tours include the coats and boots. So if you are 245 lbs. you will be over when you weigh in. BTW: They do weigh you.
I am also disappointed when I see some of the Mexican horseback riding excursions where they put the 260+ person on a horse that shouldn't handle that weight. They will tell you that the breed can handle these heavy people but that is a load of horse dung. They are just going for the money and could care less about the animal.