Expect No Frills...
And you won't be disappointed.
We stayed there back in 2004, so this information is almost 3 years old.
Mather is a no frills campground with very good access to the south rim. Its location more than makes up for the lack of amenities.
You will have water and 30 amp electric service at your site, which will be a pull through with natural Juniper and Pinon Pine trees. The campground personnel were somewhat complacent when we were there, which I attribute to the centralized management structure located on some other planet.
The camp is quiet and night, and the absence of any significant light pollution will make star gazing an awesome experience.
2007 Classic Limited 30 (Sold)
2007Chevy Silverado 2500 HD Duramax/Allison
Four Corners Unit WBCCI #8654, Affiliate NM Unit