Sam is right to discourage but helicopter rescue? Great in the movies, not such a great success rate for Saharan abductees:
French helicopters comb Mali skies | News24
Two French journalists abducted, killed in northern Mali | Reuters
I think these days plain old robbery and perhaps a shallow grave is more likely in southern Libya, especially if you have a tasty, well-equipped jeep.
Although it was and maybe still is a regular route for the
gros porteur trucks, I know of only one or two Saharan tourists who drove north Chad – Kurfa - and that was in the good decades. Even then, southbound was easier, iirc.
Basing your route by interpreting a news report [
source] that may have been written by a reporter who's never been to Libya, is winging it a bit. Just because one group were enemies of long-dead Ghadafi won't necessarily make them your pals today. I don't suppose AQIM or Ghadafi ever saw eye to eye either.
Could be wrong but it's hard to think that insurance, even for K&R, would be valid in southern Libya any more than Iraq.
Last I heard the Tubu in Kufra were still at it with whatever faction happens to be their enemy on the day - maybe even rival Tubu? And from Kufra you go where, if not Egypt?
It's going to get costly either way. If you don't get a carnet or pay the alternative in Egypt, I'd simply cross Chad (escort required in west Sudan) into Cameron and then Nigeria (but carnet also required to get visa, last I heard).