Looking at taking a 7 day Alaskan cruise June, 2016. Leaving from Vancouver, BC and we will stop in Skagway, Juneau, Ketchikan, then we port in Anchorage and are looking at staying there an extra 2-4 days there. What are some things to see/do? Right now we are looking at doing a railcar ride through Denali state park. Any suggestions/info would be appreciated. TIA