Here ya go GMoney. This is how I used to keep mine. I have traveled and cooked with it in Mississippi, Louisiana, Texas, and I think I took it to Florida once.
This is the box itself. Has latches on both sides so the top come completely off.
Little over 10 inches across.
Little over 14 inches high.
Slightly over 18 inches long.
I store it kinda of like this. Depending on what else I needed to bring with me, I might move some stuff around a bit but its gonna have to go like that. I usually would put a small bag of charcoal inside of the grill to utilize all the space.
It fits on top perfectly. ( this is my old school grill when they used to have designs on the front plate. My newer one is like yours and just says Lodge. This one has a waterfowl scene)
From the side. I some times would carry a piece of wood that was just a little wider that the ammo box top to cook on but either way works.
Hope that helps you out and gives you some Ideas about what might work for you.
Maybe someone here can tell us exactly what ammo can that is for. I picked it up at a surplus years ago.