If you're willing to take a helicopter the glacier with sled dogs was amazing. Yes it's expensive, but it was the ultimate highlight experience of our trip. We booked independently in Skagway through Alaska shore excursions and it was $200 cheaper per person than booking through Disney. One member of our party chose to go on land to the summer sled dog camp and they were not thrilled with the experience. It's crowded and riding a cart in the dirt is not like riding a sled in the snow.