I know I've been MIA on the boards, sorry fellas, i'm makin a comeback tho!

I'm sure EVERYBODY's said this before, but i've been in  situations very recently where I really wanna do this

I'd like to make a trap door for my spare (donut). Because of my speakerbox, i have to pull out my wheel well cover to get to my donut, and then damn near have to take my box out to put the cover back. It just adds to the aggravation of gettin a flat tire when you can't get the damn thing back in quickly in the middle of the night on the side of the road.
So what i'd like to know is, what's the best way to go about doing that?

should i just cut the board and put hinges on it? Or, should i pretty much get a floor put in the trunk, and cut out the hatch and put hinges on it? Or what?

ALL feedback is appreciated. I had to replace 3 tires in 2 weeks...pretty much because of...Bad Luck?