Hey clamper, I've been studying deck lid attachments for a couple of years now, trying to decide how to do mine. I don't think I've seen any two done exactly alike. Here's some of what I've seen...
< hinged at the front with:
- European-style swing-out-and-away hinges
- standard cabinet hinges
- piano hinges
- custom-made articulated hinges (GAB)
- teardrop trailer galley hinge
- modified trunk lid hinges
> hinged at the back with:
- any of the above except the Euro-style or articulated
- gate hinges
- strap hinges
^ split down the center (fore & aft) and hinged at the sides
|| slide back on drawer slides with some sort of latching mechanism
-- not hinged at all, just pop off the whole lid, retained with:
- quarter-turn (Dzus) fasteners
- studs & wing-nuts
- knurled bolts into glassed-in t-nuts
- over-center clasps
Some folks have keyed latches, most don't.
By far the most common finish on the lid itself is upholstery. Some have gotten creative and fabbed beautiful wood decks, diamond plate lids, 'glass lids with spoilers or even wings, you name it.
You can do just about anything you want, depending on taste and fab skills. Personally, I'm leaning toward hinged at the front with GAB articulated hinges, and diamond-tufted upholstery.