Be sure to inspect and test the parts that could leave you stranded (which are most, really)
Engine, esp. belts, water pump, hoses, radiator, ignition
Fuel system, esp. pump, tubes, tank, indicator (don't want to be caught out of gas when you thought you had more)
Tires, wheels, bearings, bushings, shocks, even springs
Just imagine being miles from anywhere and a breakdown leaves you stranded, perhaps alone. You might invest in a satellite phone to insure you can communicate.
In 1970 my boss went far out of Houston to photo a comet. His tire went flat and so was the spare. He got a ride from the wrong people. His murder on Jan 30th was the 31st that year for Houston area. Read about Armand Yramategui of the Burke Baker Planetarium and Museum of Science.