I am so glad I can get awesome rental discounts through my employer. >$50 a day for a full size pickup with unlimited miles!
But I think it is a dumb decision, you are going to spend wayy too much money on the trip down there, should be able to find one up here for a better deal.
That being said, I would feel confident driving my old 95 GMC sonoma with 160,000 on it to Georgia and back. Great truck!