The driving distance from Jacksonville, Florida to Sanford, Florida is: 124 miles
How long did this walk take???
Article says it took them 6 days.
20+ miles in a day is a pretty darn good pace, especially in a FL summer. Keeping it up for 6 days requires that you be in excellent condition.
I suspect “the group walked,” if indeed they did at all, in the sense that they took turns walking one or two at a time while the others stayed in vehicles with AC.