If you go through a saddle and face a steep downhill with a great view of the salt flats, you missed the ruts. Backtrack about 0.2 mile, and you will see them. Go up the ruts for 0.5 mile to a dead-end with a turnaround spot. Finding this site is a lot easier than it sounds. The agate is widely scattered, smallish, and not terribly plentiful, but it has nice moss in it and is very pretty.
Most pieces are big enough for cabs for rings, small pendants, or stickpins.
If you entered Wendover from the east, you may have noticed a bunch of dilapidated buildings and a big rusty hanger at the southeast edge of town. These are the remains of the Wendover Air Force Base. In this remote and barren spot all of the top secret training for those missions took place. Three atomic bombs were assembled at Wendover for the missions. Little Boy, the Hiroshima bomb, did not have its nuclear components installed until it was in the Pacific.