Great report!! All the detail is much appreciated, right down to your brief comments describing arrangements you made (including the name of the taxi outfit) for getting to the trailhead. I'm saving that taxi outfit's name to as a resource for future trips I might make the same area.
Indeed, it would be helpful to have a forum topic devoted to identifying local transportation resources at various backpacking destinations in the USA as well as elsewhere. Trying to figure how to get from an airport or train station to a trailhead without renting a car and leaving it somewhere for a week or more is no small feat. Local transportation issues are even more difficult when the point of entry is to be different than the exit point, and even worse by far for a solo hiker.
Anyway, with your narrative woven into to the spectacular photos, the whole report was terrific. And congrats to your fine son who shows a lot of grit and smarts.