I recommend heading up to the GoKarts ASAP to book your times, especially if you want the double karts (they only run a few times during the cruise)
Also recommend the Laser Tag area for great viewing/photos in Glacier Bay, was much less crowded than other areas - and was a great place to let kids run around, play hide & seek, etc - we went there many times and never saw anyone actually doing Laser Tag 🤷🏻♀️