Thanks guys. I did end up buying the Tide PODS detergent, and put that in my checked luggage. I never lock it, so I'll see what happens when I get my bag, whether or not it got confiscated by the TSA or the Princess security personnel.
Finishing packing tonight, then up bright and early (3:30 am Eastern Time) to head to the airport tomorrow!
2007 - Majesty of the Seas (Bahamas)
2009 - Enchantment of the Seas (Western Caribbean)
2010 - Freedom of the Seas (Western Caribbean)
2013 - Golden Princess (Alaska, roundtrip from Seattle)