My DH and I did our honeymoon on an Alaska cruise (non-
DCL). We loved it but boy did we not pack right for cold/wet weather—had to do some serious shopping at the ship clothes store for heavy duty, waterproof items as we were freezing in regular sweaters. You may luck out and get warmer weather but the cold is no joke, and I could see how it would be a dealbreaker for some.
We have been very on the fence about returning with kids though. As active 20-somethings when we married, we had a great time whitewater rafting, hiking, ziplining, horseback riding etc. But our kids are still pretty little and I’m not sure we’d like doing the excursions for their age range (things like the lumberjack show and white pass train). It also stinks that DCL does not have an indoor pool—we had that on our other cruise and the lack of one makes me question whether DCL is worth the price for Alaska. I know the pool is heated but stepping out of a pool into freezing weather is no fun.
I think I’d like to wait until the kids are tweens/teens so they can fully enjoy the outdoors in Alaska like we did. Not sure how old OPs kids are but that for me is the main decider.