I planned on staying at the fed campground in Mammoth, but it was full when I got there. I followed the GPS's advice to the next campground. It was an RV place with cabins---no tents. The only cabin they had left was a 2 room for $81..So home for the night.
I really wanted a shower..fed campground in Teton had no showers, plus they had wifi so I can do a little research about my next move on the trip.
Plus the view from the front porch isn't bad either.