RCCL's Rhapsody of the Seas cruising the Inside Passage to Alaska, was a wonderful experience for our 3 generations group of 20 - ages varying from 6 to 76. We were all together to celebrate my 50th birthday and there were plenty of activities for all ages and we all conveniently met for dinner every day to talk about our adventures. Recommended workshops are the "shopping in Alaska" (sit up front if possible) and the "gemology" as well as the traditional napkin and towel folding. The Centrum shows were spectacular and (for us) spur of the moment as we headed back to our cabins. My one complaint was the evening shows were so booked solid that there was not enough space for everyone, so you had to arrive almost 30 minutes early if you wanted a seat, and give up trying to meet anyone there.
Wine is 2 bottles per stateroom (with at least 1 over 21 year old). It needs to be packed in your carry-on bag. The all you can drink package is definitely worth it for the drinking set ...
The cruise "excursions" were all well coordinated and handled efficiently. Of course that is why you pay a bit more to have the cruise line handle things. Alaska was extremely picturesque and we say whales, porpoises, one seal (we think), eagles, salmon, and even a bear!
The only recommendation is to bring "flatter" suitcases. The flatter cases fit under the beds. Because ours did not fit, we were a wee bit cramped on one side of the bed. Oh and bring a multi-slot extension cord - there is only 1 outlet and it is nowhere near the headboard. You may also want to bring some binder clips to weigh down the shower curtain and some magnets so you can leave notes on each others' doors. Especially with a large group - it is nice to know that you are knocking on someone in your groups door ....