NEED ADVICE! 20 Hour Car Ride!

Hi everyone!  I am in need of some advice ASAP!  We are heading to my sister-in-law’s (Karma) for a mini vacation soon and we will be driving!  It’s a good 20 hour car ride from Madison, WI to Chesapeake, VA.  What advice do you have for entertaining a 2 & 3 year old for that amount of time!  Love to hear any and ALL suggestions! We are currently planning on driving as far as we can on day 1 (leave REALLY EARLY) and then stopping around 5/6ish at a hotel with a pool to wear the girls out.  Then we’ll have a shorter Day 2…