We are in Tromso right now!!! Did that tour.......LONG day. Beautiful scenery though. The town where you get the ferry back to Tromso is quiet. NOTHING to do/nothing to see. We made the mistake of getting the early bus from Tromso that gave us two hours in that town.
Today, we are getting the 'fast boat' to Harsdat (three hour boat trip there and three hours back). Will let you know which trip is best