My husband and I (in our 30s) are taking my parents (60s) on an Alaskan cruise for their 40th wedding anniversary. None of us have ever cruised before. We're looking for a Northbound or Southbound cruise that ports in Sitka and goes through Glacier Bay. We would like to have a cruise that is more on the casual side than formal. Does anyone have any recommendations? Any tips for 1st time cruisers?