Happy to answer, although this is a bit of a funny forum for it:
From a work perspective, it's pretty simple. I quit, and then was rehired to the same position a year later.
But The Times' Graphics Desk was super nice about it. We had a handshake agreement that I'd come back when I got back, and they even lent me a laptop to maybe file some travel-ish bits and bobs from along the road. So in that sense, it was partially justified.
In the end I didn't end up writing anything for them for a few reasons: I didn't want to turn the ride into work; I wasn't on my best NYT-standards behavior (booze, bribes, women) — well, one spectacular woman, and we're married now; and finally, I personally hew somewhat to the Janet Malcolm attitude:
“Every journalist who is not too stupid or full of himself to notice what is going on knows that what he does is morally indefensible. He is a kind of confidence man, preying on people's vanity, ignorance, or loneliness, gaining their trust and betraying them without remorse.”
Especially with respect to travel writing. You can do it right, but you really have to take the time and be invested and involved. And I was riding to follow the seasons and wasn't.
Ultimately, even though the industry as a whole is in decline, the NYT and other world-class news sources are still strong, and in some ways, getting stronger. In particular, the visual journalism The Times publishes every year keeps pushing the state of the art.