Our recent cruise on the Summit, the real dog sledding and helo ride was $399.00 per person. We could not justify the cost.
The dry or cart dog sled (on your own and not offered by the cruiseline) was $89.00 plus tax per person. Here is the link: http://www.alaskasleddog.com/
The wife and I passed on the no snow dog sled, just did not look appealing.