Might take the Jeep since it has A/C and just need to add an Aussie to the rear....................
You could easily do Hell's Revenge, Metal Masher (I think), and Elephant Hill, but there are two or three places that would be difficult on Rusty Nail, White Knuckle would be the major issue on Behind the Rocks.
Are you thinking of getting a Steve Irwin sticker for the rear window?