Bring extra fluids oil, transmission etc.... and hand tools. A tire pressure gauge that will read high pressure think mine goes up to 120~ if it has a spare tire bring things you would need to change it, (I have a little torque multiplyer I got for 60 bucks that works great) Look at Everything before leaving. I know some folks change the oil and fuel filters before there maiden voyage this is also a good idea especially with a long trip. Keep a close eye on temperatures and pressures.
If the biggest vehicle you have ever driven is a pickup truck try to plan a route that doesn't take you through the middle of a big city....
Most importantly have fun! And welcome.
FWIW I also brought a giant chain incase I needed to pull the bus a little ways down the highway to get it out of the way but unless you have a big truck don't worry about the chain