Where's the best dog-sledding in Alaska?



Hi everyone! I've been reading this message board for a while and today I joined it. I hope someone here can help me. I'm going to go my first Alaskan cruise in August, on Princess, and am pre-booking shore excursions. I want to splurge on one thing, which would be dog-sledding on a glacier. Where is the best dog-sledding -- is it in Juneau, or in Skagway? Also, I'd be grateful for any other suggestions of shore excursions, keeping in mind that my teenagers aren't interested in water activities. For example, would the lumberjack show be interesting to teens? Thank you.