Find Wild Bill - This one is simple. Once you get the mission to go to the steelyard, just talk to Milly. She'll ask you if you could look for Wild Bill in the Steelyard. You'll practically stumble across the body if you are exploring the steelyard. He's just lying dead on the stairs in the far left corner. Just examine the body and get the note to confirm his sacrifice. Remember to grab his pistol. When you go back, you can talk to Milly and tell her any of the options. You can lie and say he's alive. You can just tell her that he died. Either way she'll hand you 6 stimpaks as a reward. You can also use your speech skill to do a crazy version where you tell Milly that you found a mutilated Wild Bill in agony, who could only be mercy killed with a bunch of pistol ammo and a cinder block. She then comically passes out and drops the 6 stimpaks on the ground. They are usually thrown about during the fall though, so good luck finding them.
The real bonus is WIld Bill's Sidearm. It's a very fast, reliable, and durable .32 caliber pistol. It's surprisingly good and perfect as a backup weapon for any character.
Food - You can get free slop from Kai as a slave. It restores 25 points of health but costs you 25 rads. I personally just gather stimpaks from the steelyard, but some people might want to get as much free slop as they want. Once you get to Uptown, you can get free noddles from Lulu.
Radiation - The high radiation can be countered to a certain degree once you get to Uptown. You can get free Rad Away from Phantom if you want it.
A Dual - If you enter The Pitt in any way that leads to you being beaten by Reddup, then you can challenge him to a dual once you get to Uptown. You can kill him without any consequences with the raiders.