Honestly, I've kind of decided against those. Originally I thought I'd build this like a bass boat (hence the deck) but ultimately I pretty much realized I've got a small, weight conscious, boat. Therefore, despite using aluminum for framing and for the plating, I decided it would add much more than would be smart, and as an avid duck hunter I'll be carrying a lot of excess weight as is. The purpose of the rod lockers were simply though to have a place for my guns while hunting... as my boat is originally for hunting not fishing.
The design I had in mind for the lockers were to keep the benches in place and tunnel through them. I thought that the back bench at the transom end would be the stopping point, and the middle bench would be hollowed in that section. To build the locker then, I just would plate it all with the aluminum and rivets, and use a dremel with a cut off wheel for precise cutting of the bench. Then I'd use a knife to cut the styrofoam out. Overall, it would allow for a place to slide the rods with them out of the way, or guns if it were that season.
My current design that will likely proceed though, is as follows:
-remove front and rear bench, and hollow out the middle.
-Use existing braces for the front and rear benches for the decks.
- deck from front bench forward with underneath open. this eliminates the necessity for a hatch, and allows for good, usable space.
-Deck from rear bench to the transom. Leave small gap in rear (4x12") to allow for wiring or fuel lines to pass through.
-foam will be added to both front and rear, but I'll show you how when I put up pictures.
-middle bench will become a hatch, where the battery is stored to the side, allowing still for a lot of room to store the life jackets, fire ext, lights, etc.
Using this type of set up will allow for the gas tank and battery to stay dry and out of the rain/snow while hunting (which is a big concern for me). Also, it will allow for the maximum usable space while hunting with all of my decoys, perhaps a dead deer, tree stand, and bow too? I do like to hunt the public waters for deer using my boat for access. THe reason I decided on the open lower space for the front deck is to provide a deck for fishing, while still being able to stow my bags or other gear out of the rain/snow.