Article from DMV.org
Before Leaving on a Trip
It’s a good idea to get your car serviced before heading out on a road trip. Part of the checkup should include a look at the tires.
Look for any unevenly worn spots, or skimpy tread. If the tires are iffy, invest in new ones. You’ll need them eventually anyway, and it’s better to start out on a trip with new tires than have a blow-out in the middle of nowhere.