Bill_G and others, good thoughts and questions.
I am primarily thinking about gear that will wind up on a boat. These are resources I have been studying:
http://cruisingresources.com/Waterproof_Boxes_and_Bagshttp://store.thewaterproofstore.com/ If I was thinking land based I might check this some more:
http://neatcontainers.com/shop/index.php?cPath=2 I like freezer-style Ziplocks but have experienced too many holes and tears that made themselves know in unfortunate ways. I am looking to upgrade.
Right now drybags with transparent panels are looking pretty good - and, yes, I will probably use Ziplocks inside the drybags!