Im planning on building a deck & drawers for the 6.5' bed of my GMC1500. Bed has a plastic liner. I have seen quite a few homemade wood types at events. Anyone have experience/plans...Do's/Donts? I would like to make one drawer wide enough for wingers. 3/4 plywood or is 1/2" good? Marine Grade? What type of framing? Carpeting? Any tips would be greatly appreciated.