Congratulations on your engagement!
An Alaska cruise vacation would be very memorable for you and your guests. Princess cruise line (the "LOVE BOAT") shines in Alaska.
The Alaska cruise season runs from mid-May to late Sept. Cruise itineraries range from round trips out of Seattle, San Francisco and Vancouver, BC to Northbound cruises from Vancouver, BC to Anchorage (Whittier) or Southbound voyages from Anchorage (Whittier) to Vancouver, BC.
Any of the cruises will present amazing sights and adventures for you and your guests.
It is a bit easier to arrange a R/T rather than a one-way cruise for a wedding - it is less expensive for travelers to arrange R/T flights and there are fewer connections to make to arrive at the departure location.
Wedding ceremonies can be arranged onboard the ship or at a port stop.
Cruises are great multi-generational events because there is so much to do and see regardless of the age of the traveler. All your guests can be fed and entertained and you can relax knowing they are being well cared for. The details and payments are arranged in advance so you can focus on your wedding.
Your guests will be thrilled - Alaska is one of the most desired trips of all cruise destinations!