We went to Alaska a few years ago (our first cruise) and loved it. We booked excursions thru the ship and had a wonderful time. The tour guides were terrific and added a lot to the experience.
Cruise lines frown on taking liquor on board although wine is ok. I take wine for myself and then when we board the ship my husband buys a bottle of bourbon to have in the room. It's a little more expensive but a lot less trouble than trying to bring it on board and have it confiscated. They may not go that far but why take the chance. Don't know about the beer.
Have a terrific time.