When I plan a road trip, I do it in steps:
Setting your route and destination.
Limiting daily driving if needed: We usually don’t drive more than 5 hours a day to avoid sleepy driving. Or switch drivers.
Arranging accommodations.
Prepping my vehicle: Gas, Oil, windshield washer fluid, tires. I make sure we have first aid kit, jumper cables etc
Pack essentials: Any clothing, plenty of water, snacks, and phone chargers.
Find points of interest along the road. I favor scenic byways to highway driving.
I always make sure we have a way to defend ourselves in case of danger situations.
From Pity to Praise 