The trip with Scott, the sympathetic guide, was well organized. The conversation during the ride was interesting and he provided food, drinks, covers and even music during the waiting time. However, keep in mind that you should have realistic expectations. During my tour, the view of the lights wasn't as impressive as in the most famous pictures of northern lights (colors, waves, etc.) because it needs a really high Kp index (major geomagnetic storm). But as the Kpi forecast was rather bad for the nights during my stay, I decided to simply give it a try one night. I was able to see some activities in the sky but it was actually all black and grey and during few seconds (The Kp Index was around 4 with some clouds during that night). And as the lights were above our heads it was impossible to take selfies with the lights behind us for instance (as you can see in some seductive advertisements for this kind of tours).
The only thing I can recommend is too choose a night where the Kp Index (aurora strenght) is high (more than 5) and the sky is really bright (cloudless). But this kind of situation during the fall and the winter time (period to see the northern lights) can happen only once or maybe twice in a month (good Kpi associated with a good weather): it's quite RARE! So: hopefully there is one night like this during your stay in Alaska. (The guide looks for the clouds radar and will ask you few hours before the tour beginns if you still want to go if there are many clouds. But I think it is also important to know - approximately - the kind of visions you can have considering the level of the Kpi and knowing that the position of the lights is unpredictable because no one tells you this.) Good luck!