Sounds like a great trip coming up, like barbee said we get excited too! I've done two road trips back in unknown vehicles. One 600 miles and one 1200 miles. These old cars are pretty resilient with some basic maintenance. When I picked up my 79 Powerwagon we went to the local auto parts store like your gonna do and went over the truck. We fixed what we thought it needed to make the trip, and drove straight through with no issues, thank god! Funny thing was the guy I bought it off of happened to pass by and see us at the parts store with the hood up. He came flying in brakes squealing, and wanted to know if we were ok. Best of luck on your trip and keep us posted!