The need/desire for ATC and RFF are also considerations. The aerodrome/rwy physical capability to take the acft isn't the full story, except in an absolute "no other option scenario". Most militray bases, out of hours, don't have any RFF.
A west coast example from a couple of months back on a weekend has PH fogged in and a foreign international wanting to park at LM. Changed his mind after being told descent would be OCTA, CTAF broadcast etc, and the only RFF capabilty was the local CFA boys, and it would take 30 minutes to get them there.
Rousing customs/immigration/qurantine for international diversions to 'other than normal' locales can also be a challenge. This can result in the crew being told they must keep the pax on board until the lads arrive. That's assuming there some ground handling capability there, including a set of steps that can reach the door.