I wear diapers most of the time when I can and so yes if I go on a road trip I always wear an adult diaper so I don't have to stop and use the restroom so much.
I just wet my diaper and keep going down the road. I only change when I start leaking. I wear ABU Super Dry kids diapers on road trips. They work really good for me.
Bambino diapers are also good for long road trips.