To get to that bottom bolt, Mike, just use a 1/4 drive socket with an extension (I'm sure you've got one of those). Put a wash cloth or rag under it (and over if you need it) to protect the paint from being scratched and stuff.

You'll want to remove all the other bolts first so you get as much play out of the assy as possible to make it easier to get under the light.

Other than that, just don't reuse that bolt when you put them back in.

Another trick that makes it easier to remove them in the future (as well as instaling them this time without any trouble) is to undo the harness on the bottom of the assy. The plug is screwed into a bracket on the bottom. You can remove the screw and then just tuck the harness out of the way and I found it makes it MUCH easier to get them back in without having to manhandle them.

Good luck with this one sir. I think I would rather pull the head again than do this for the first time.