Rick,

 

What about an extra fuel cap?   :-)

 

The real question is how do you get back the required structural integrity without creating a high spot on the upper wing skin that requires 5 gallons of primer and 40 hours to sand smooth.  Even a 2 BID on the outside would create a bodywork nightmare.  Maybe structural integrity is less of an issue that you might think.  We have fuel caps, speed brakes, etc. cut into our wing skins already.

 

I like option C, open and clean, de-core the prepreg, fill and sand.  You might be able to slip in a 2 BID patch and Hysol it to the inside of the hole with as much overlap as possible.  A round hole won't allow for overlap, but a square hole will.  You could paint the inside of the patch with fuel tank sealer.

 

Removing the skin is out of the question, since we don't have jigs for installing the upper skin.  You could do a bottom skin "wing rip" and do the repair from the inside, just like the wing re-closings.

 

Mike