Anyone ever been? Do you have recommendations for a white water rafting tour operator?

I've wanted to do this since I was young and never have!

I'm going next year, no matter what. I'm taking the kids so no, we can't do any high level rapids and probably only 4-5 days in length.

I've done white water trips before and kayaked the Inside Passage with orcas for a week, (one of my all time favorite vacations in my life) so I sort of know what to expect but there are tons of operators out there.. I'd love to have a personal recommendation.

Any experience with this?