Hi Beryl,
We were on Infinity first week of August last year. We tendered in to the port at Ketchakan because there were already ships parked at all the docks by the time we arrived. When the Princess ship departed in the afternoon, Infinity cruised in and parked in its place so we were not required to tender when we got back on the ship that afternoon. So, you never know for sure about tendering but that would be the same for ANY cruise line. I highly recommend GTS Infinity to Alaska. It was GREAT!!
Happy Cruising,
Michael