homemade hinged bed board ideas?

[gulffishin]

I have a fuel cell under my bed floor and am in the process of making a new wood floor. I really dont want to cut a hole in the floor, so I was wondering if anyone had any ideas on how to hinge the bed board above the filler for my fuel cell. I have seen other people use a kit, but I've also heard it is expensive.

Any ideas on the "cheap"?

Thanks