Also, I've never had to wait for a wildhorse shuttle. There are two of them in the morning and evening.
I haven't stayed there either of the last two years but I don't see how they could have really changed anything to eliminate the (short) wait between shuttles. Sometimes you get lucky and pack onto an already full bus right before it leaves but usually you have to wait at least a little while.
I love all the shit Wild Horse gets on here. My friends and I used to camp there back before they started including the price of camping in ticket prices and never had a problem. The rest of the campground probably didn't like us that much but we were generally as loud as we wanted to be.