I still think that aif the captain realizes his position fast enough the Reagan could find a sourse of High octain jet fuel left over somewhere. After all, once the first rounds of fighting dies down, there arn't jets left around, but somewhere on the planet there would certainly be a refiery with tanks full of crude waiting for someone to come along and claim it. And as it's fighters wore down, I am sure they could locate a back water air base somewhere that had enough jets that could be fitted out to keep them the strongest force left on the planet.
They can get an AWACS, (a converted 707, if I recall) onto and off of the deck, I am sure with enough time and motivation they would turn up enough aircraft from some sorse to keep fighting.
And again, I believe that once they have made a mark, other units in the vicenity will join them, either for protection, or to join in what they think is a rising star, or both.
THe senario of a surviving ship is too unlikly. Not only does it suffer the same deficits, but becuase it has been around, unless it was hidden, and pops up suddenly, it is already exausted and already has it's supporters, and would not be a rallying point.
(man I GOTTA stop these long posts...)
After six months, the Reagan would no longer be recognizable to someone from our time line, but it would have at least a couple of planes airworthy, at least some ammo left for it's secondary guns, and likly the ONLY long range rader operational on the planet. As key as a modern carrier group is for force projection today, imagine what it could do, even with GREATLY reduced strenght if there is
A: no force left on the planet that can threaten it, and
B: no force that can project force, so there is no one to compeat for it's attention. Even if she ends up with old biplaes with tommy guns, there will simply be no force left to stop it.
Anyway, it has been an interesting concept.
Peace
Mr tek