Normal
Find out how many other ships will be in port at the same time as you are. That will make a real difference as to whether or not an excursion is 'sold out'. If your ship is the only one it town - you're fairly safe to wait until you get there. But if there are 3 other ships in town - book ahead!There should be a site for Skagway's Visitor's and / or Convention Center. If you can find it, see if there is a link to "Cruise Ships" and look for the Cruise Ship calendar for the date you will be visiting. That will tell you how many ships are in that day.
Find out how many other ships will be in port at the same time as you are. That will make a real difference as to whether or not an excursion is 'sold out'. If your ship is the only one it town - you're fairly safe to wait until you get there. But if there are 3 other ships in town - book ahead!
There should be a site for Skagway's Visitor's and / or Convention Center. If you can find it, see if there is a link to "Cruise Ships" and look for the Cruise Ship calendar for the date you will be visiting. That will tell you how many ships are in that day.