ironsraven has a good answer here. IMHO, you have to have some type of moisture repellent in those water tight kits. Cabela's, and other online sources, sell the silica gel "pellets" in a small tin. The tin is heated in the oven at 250 to restore itself. I use these small tins for foot lockers, etc., and the larger cans for closets, safes, etc. They work great. But there is the maintenance factor.

I guess what I'm asking is, are waterproof containers necessary in a trunk kit? BTW, your kit is much more impressive than what I currenlty have. What water are the boxes protecting our items from? I am thinking of redoing my kit and using a heavy duty nylon or denier bag instead. With a should strap, it would be easier to go mobile if needed. I'm actually thinking of using a fishing tackle bag with clear box inserts, and clear pockets. Am I off base?