We booked the day before we docked on our iPhone with Olden Adventures for the Loen Lake and Glacier tour. We booked day of for the Olden Adventure RIB boat tour. I highly recommend both of them. The key is the weather. It was very cloudy when we were there so if you pre booked the sky lift, it was a waste as there was no view. On the Loen Lake tour, they offered tickets to the lift at the end of the tour but advised against it due to the lack of a view. Very honest tour guide!