We went on an Alaskan Cruise from Seattle on Norwegian (verandah room high-ish deck, close to the two-story lounge.) We've been on a
Disney cruise on the Wonder in a V class stateroom (the family verandah stateroom swanked-up and with concierge service). It depends on what you want for a trip to Alaska for sure. I don't know what the ABD includes but if it's as long as the cruise, you'll have to factor in the price of your lost wages or lost vacation week, not just that it is the same cost as upgrading to concierge. With concierge you would get just that. That feeling of luxury that can be missing from a busy cruise. The concierge lounge on the Wonder is the largest in
DCL and is has the largest enclosed area (helpful, if the weather is inclement), free cocktails every evening (a bonus if you would drink a bit each day) and concierge staff that will make your trip over-the-top special if you let them know it's your anniversary. You feel pampered from the moment you board. The cost is the key. I found that because we were a sister group and it was a birthday during the concierge cruise on the Wonder, we would want that attention. The cost of concierge for the cruise we took was not the premium that it is on some of the longer cruises, however. But it felt truly special. Now on the Norwegian, it was a family cruise, so the concierge level would have been wasted, as we wouldn't have gone for cocktails each evening, nor did we need to book the spa or excursions early. On our Alaskan cruise (Norwegian) and our European Cruise (Disney) we've had excursions canceled, so I wouldn't depend on anything being without some disappointment , ABD included. You'll need to decide if you prefer pampering or adventure, I think. Enjoy, either way!