We did the ERA helicopter glacier/dogsled tour in Juneau and I would highly recommend it to anyone. It was a 20 minute helicopter flight over various glaciers, landing on the top of Norris Glacier where there is a dogsled camp. You actually ride the dogsled for about 45 minutes and then the helicopters come and take you back to Juneau. We booked it through Princess and it was $499 per person, but it was well worth it! Here is a picture of the dogsled camp. The pictures I have seen of the Skagway dogsled ride is on dirt, not on snow.