The trip isn't for sure yet, but I'm working on it. I've given #sonTwo a couple of hints, but I have not directly stated that I'm visiting.
As I said before, I looked at getting a rental car (two days' drive time each direction, assuming I drive at least 12 hours per day), taking Greyhound, taking Amtrak. I think the single travel day in each direction will swing my decision. (If I had indefinite time to travel, I'd be greatly in favor of driving; since I don't have that, I'm opting for arriving in one day, and not exhausted.
I have to find a book and a toy to bring with me, so I can present them to #GS3.