Thank you for bringing this up! We are booked on the Sapphire Princess next June, so I only looked at one-way options for that month. Right now on the Princess website it looks like Northbound cruises are visiting Skagway, while Southbound cruises are visiting Icy Strait Point (the other difference in itinerary is College Fjord for NB and Hubbard Glacier for SB, which we already knew). This is for Sapphire, Grand, and Majestic. I will keep an eye on this while I research which option sounds better for us...