Ahh, seeing your sons follow in your RV footsteps is rewarding!
Son #2 took our little Class B from NJ to Napa Valley,CA with stops in Niagara Falls, Chicago, Badlands, Mt. Rushmore and Yellowstone. He has a job as a chef at the Bottega restaurant in Yountville, CA.
Son #1 drove his little brother's Ford Ranger from NJ to CA and flip flopped vehicles. He picked up a few friends and stopped in Yosemite on the way back to NJ. They also went to the Royals/Tigers game in KC.
Between two vehicles almost 7,000 miles of driving and no mechanical issues!
Although I did hear of one speeding ticket in WY...