Go talk to the dude in the general store and tell him there's a drunkard in the Den that looks like Karl, and says he's a farmer.
Go back to the ghost town and talk to Vegeir. He'll give you an assault rifle. Also ask to take Johnny back home.
BTW, be sure to take the car with you when you go to the ghost town.
Otherwise it will disappear by the time you're escorted back to Modoc.
Also don't go down the fountain now, or the car will disappear, too.
It also seems to disappear at the Raiders, and in lots of other
places. God, the various car related bugs annoyed the living daylight
out of me, throughout the whole game! *sigh*
Talk to the tanner. He'll give you a "Combat Leather Jacket".
Personally, I think it's pretty crappy, compared to the mk II metal
armour I had by now. Also, although the description insists that it's
got TWO sleeves, the picture of my character wearing it looks the same
as with the one sleeved jacket.
Now if you want to, you can also go to Gecko and receive some
anti-radiation medicine for rescuing Woody, and/or to the Den, to tell
Karl he can go home (worth 500xp). Either way, leave for Redding when