I've been using Google Maps on my phone to navigate the country. Normally it shows me 3 different routes to chose from. It's free and reliable. However, I like to check it against a hard map. I use the Motor Carrier's Atlas, which shows me approved trucker routes.
2013 Chevy 3500HD CC dually
2014 Voltage 3600 toy hauler
2019 RZR 1000XP TRE