Small bit and bit holder does the trick also, remove the turns signals
Click to view attachmentOr take a bit and put it the proper size socket, and put it in
I'm a tool whore so I am sure I can find about 10 different ways to do this with out taking out the turn signal buckets.
Hold the bit in a pair of vice grips
Hold the bit in your fingers
Hold the bit it a socket
Hold the bit in the tool shown above
Bit in the flex thing
Right angle screw driver
Goto autozone, have them replace your light bulb. Have your wife do this it works out better. Have her tell them she took the cover off thinking thats how the bulb got changed.
Drive it up to Mark's shop and ask to borrow the proper tool, and do it there.
Go to any tool store buy the proper tool, and promptly bring it back.
Get a 12" long 1/4" bit, drill a hole from the outside fender through everything that gets in your way to the screw. start the screw take a 12 inch long #2 philips screw driver and screw it in.

Problem solved.
Sorry not trying to be an arse about it, just can't believe taking the turn signal bucket out is the favored way.
Carry on