Re: What do you keep in your Dock Box?
short answer - booze.
I usually have 12 cans of beer, and a bottle of liquor in the dock box.
Also, typically my shore power cord goes in there. A folding chair or 2, a tackle box, and enough room to put my primary anchor and BBQ on race night. (too much weight at the ends of the boat, you know...)
Good thinking on your part to build the box specifically based on what's going to be in it...
Post a photo when you're done?