Getting there -- UBER/LYFT, Taxis, etc.
If you're planning on taking Uber or Lyft to come to the wedding, I have only one word: don't.
According to both services, Wrightwood is out of bounds, and the way they work, an Uber driver can pick you up in-bounds and drop you off out-of-bounds, but they won't pick up out-of-bounds and bring you back.
I don't think I've ever seen a taxi or an airport shuttle.
The best option if you're coming for the day: rent a car.
If you'd like to stay, Jucy has small camper vans at very reasonable rates -- this gives you a rental car and a place to stay. If this sounds good to you, consider flying into LAX.
We'll have more info soon.