Once a time in the West, vacations and roadtrips involved a walkie talkie, an HF mobile radio, a paper repeater guide, and tolerance from family and friends.
Today the road trip is easier.
A smart phone holds your online RepeaterBook and either Echolink or RepeaterPhone app.
The former gives you location based identifiers of LOCAL repeaters that the trustess and users care enough to share with you. If it's not accurate, blame them. The volunteers at this free service do their best vetting the reports.
The other resource gives you an opportunity to connect to the local folks at the far end of the microphone cable to let them know you're coming and get tips before hand. Sadly, there are places that don't have, to this day, Echolink or, better, Allstar connections.
Once there, or even before you leave, you can program the HT for the splits and tones required.
So how do YOU road trip?