Ditto this! We've driven to FL from NJ many times and this book is the BEST go-to reference for everything on I-95. It makes it so easy to decide which exit/rest stop to use for bathroom breaks, food, gas, etc.
The Chesapeake Bay Bridge Tunnel is neat as it is such a looooooong bridge with 2 short tunnels. It's a marvel of engineering and when the water is choppy below you, kind of cool.
Did you remember to add in money for tolls? So many roads will be toll roads - esp. in Delaware... it's a small state but they make up for it by politely taking your money every few miles, or so it seems... no offense to any Delawarians.
When we drive straight through from here in NJ (central coast), it takes 16-18 hours to get to WDW. If we stop for a night, it takes about 19 hours of drive time. Keep an eye on any big cities you're driving through and try to avoid them at rush hour (6-8am and 4-6pm) on weekdays or if you do hit them, expect heavier traffic.
Use Google maps to show you any "red" zones and how long they extend so you know if it's okay to sit through a traffic jam or if you'll be better off finding a detour.