Grille Lift

Got your attantion

After reports of my whole grille bouncing up after each bump in the road:

I found the nut and bolt fell out of the bottom of the grille. This is what holds down the grille to the front frame.

I know I can take the whole radiator/grille off and replace, though is there an easier way? The top nut (Grille-side) is almost impossible to get at, even when I remove the grille (as I remember).

Is there a trick to this? A better tool, etc?

TIA!