There is no definitive answer to this question as it depends on personal preferences. Some people might prefer a large deck with plenty of space to sunbathe and relax, while others might prefer a smaller deck with more intimate areas. It is also worth considering the time of year that you are taking your cruise, as the weather in Alaska can vary significantly. If you are taking your cruise during the summer months, then a larger deck with plenty of space to sunbathe would be a good option. However, if you are taking your cruise during the winter months, then a smaller deck with more intimate areas might be a better option. Ultimately, it is up to the individual to decide what deck is best on an Alaskan cruise.