The 1960s called and want their conversation back!
This is LOL. Hobby yes. 21st century communication? No.
Get a phone. If the phone don’t work and your worried, get a plb or a sat phone. Sat phones are expensive though.
Are you literally going where there are NO other people? In your RV? There’s about a 0% chance of that.
Now if you’re getting into the back country I understand, but anywhere you can have a ham radio plugged into your RV, you will encounter other people.
Unless you’re a hell of a lot more adventurous than me! Which I doubt.