This is a different thread and I can't do it every time, but for me Amtrak *is* a preferred alternative to flying. Less boxing/unboxing, seats with legroom, etc. So I've done that more often than riding the bus. I've filled in with one-way car rentals vs. flying in some other cases. A drawback not mentioned above I have for the bus is the seats can also be more cramped to fit a 6'4" inch person.

On those overnight sleeps in an airport, I've been most comfortable if I can bring an inflatable and a pillow. The seats are often hit/miss due to both arm rests and hard surfaces.

I thought I had that problem licked one time by booking an in-airport hotel in Atlanta. The problem was the in-airport hotel was inside the concourse. Delta didn't want to check my bike or luggage all the way through to my destination because the layover was ~10 hours. So that meant receiving my gear - somehow finding some place to store the bike or taking it and gear into the back through security to the concourse hotel. So instead I cancelled the in-concourse hotel and went to the international terminal and created a "fort" with bike box and slept behind it on the floor.

I also had a different time when I was connecting overnight in LAX to an international flight to Manilla. Again, too long to book my bike through to destination. In that time I found a service that came with a van, picked up my bike to store overnight and then rode the local city bus to hotel not too far away for the night.