I think it all depends on the kids. Mine were raised on taking long trips starting at about 3 months of age. My step kids also travel well. Timing is key too.
A couple years ago, we took the camper to Myrtle Beach, approximately 600 some miles and 12 hours. It was a full vehicle, me, wife, 5 kids aged 10-19, 2 dogs & an african grey parrot, all in the Excursion. We left right at dinner time and drove straight through, kids watched a few movies then fell asleep. It was the quietest smoothest trip ever. I even thought the bird didnt make it because even she was quiet the whole time.
Jim & Evelyn
-2015 Ford F-350 XLT Dually
-2014 XLR Hyperlite 27HFS
-2012 Harley Davidson Street Glide (his)
-2004 Harley Davidson Fatboy (hers)