This site will give more exact details and numbers of people that took a certain trail or just over all the amount of African American people that were involved. his site will also will give you a great time line with details.
This site mainly talks about the trails that African Americans went on. And were they started. And as you can see they have some great examples of maps.
This site will include lots of different types of information in forms of video,pictures,and articles. The only down side is that do advertise for other companies that may not be trust worthy.