Thanks Guys for responding.

AZBUCK yep it make sense and is what my research is coming up with. What information would work good for navigation units? Longitude and latitude? As im from the UK I cant seem to buy an actual gps unit and the price they want to charge fro the car rental company doesn't make sense. Do you know of a good offline app I can download to use on my phone. I read that the tom tom one is good but have no experience with it?

Mark -thanks for the response and thanks for the suggestion like AZBUCK - ill have a whirl with it tonight and see how it is. The first lef is going to be new orleans to Natchez so would be good to check out how this route would be planned.

Just hoping that the the holiday will still go ahead at the moment!!!!!!!!!