[Spartan302]

With most fuel gone 777 much lighter, also 777 has been said to have “robust” reverse thrusters, that and computerized ABS braking pushed to the max I believe the 777 could have landed on a very short runway, even less than 3500 if it had to be done.
Would be interesting to see some FAA reports of jumbo jets and emergency landings and what they took, like that infamous SuperGuppy 747 that landed on a small airstrip last year.

[Yosemitest]

Ponder this:

Which would be less noticed (?): a Boeing 777 landing at a large airport with other commercial airliners that arrive and depart around the same time; or
a Boeing landing at an airport with a shorter runway that rarely has a large commercial airliner arrive and depart?

I think the smaller airport would only be useful IF ...

it was in the center of a large military base that was expecting it,
and could keep civilians out and away from the airport.
Of course, night time landing with little aircraft light on would be of great help.