Personally, I'd be inclined to skip the wedding.
Here follows my thinking and quirks if I were in your shoes.(YMMV, of course):
It's a fair bit of driving.
Even when I'm doing ok, I tend to really stress over "getting ready".
Everything always takes longer than I think it will. Which stresses me out big time.
There always seems to be more decisions to make than there should be in packing. When depressed, I'd get gold in the Indecision Olympics.
Oh, and people. Isolating might not be good, but for me, that would be too much.

When I'm feeling like you describe, it's a big deal to get to the shower, let alone the wedding. (LOL. Sorry, couldn't resist bad joke. Still, it's true.)

Is the draw of the wedding the wedding itself or having a holiday? If it's the holiday aspect, could you maybe do something sized-down and closer?