by the end of the chapter 1 what do youu know about the hitchhikers ?

I'm not sure what you are asking here. Into the Wild begins with Jim Gallien driving through Alaska, when he sees a hitchhiker who looks as though he is eighteen years old. The hitchhiker is of course Christopher McCandless or , by his adventurer name, Alexander Supertramp. Gallien reluctantly takes Chris to the beginning of the Stampede Trail. The story then weaves around Chris's life at different points.