When we cruised on Royal Carribean to Alaska a couple of years ago, we read beforehand that the dress code is much more relaxed on Alaska cruises than other itineraries (at least on Royal Caribbbean ships). We found this to be true in our own experience. There were actually nights where the dress was completely casual and jeans were acceptable. On formal nights, we found that very few people dressed up, and there were almost no tuxes.
For people that haved cruise on Princess to Alaska, what is your experience with dress code for dinner? I don't mind dressing up for formal nights; I actually enjoy it once in a while. However, if the typical dress on formal nights is more like coat/tie, I would rather not bother packing the tux.