I don't see why anyone would want to travel around with Benny. Just look at the guy's record. The first time you meet him he put two bullets in your head. The next time you see him again, assuming that you are foolish enough to either fall for his trick or decided to forgive him, he will try to kill you again. Finally, when he is at the Fort, when you free he, instead of fighting at your side, he betrays you ones again and leave you to be killed. This guy is a dirty coward and have a nasty habit of backstabbing others. If you travel around with him, what makes you think that he will not cut your throat when you are asleep, take all your stuff, and run away?