Individual Health Insurance Coverage – health background not perfect?

“Thus my sweetheart and that I want to go to Nevada with some friends. We-don’t have a vehicle”My girlfriend and that I equally have comprehinsive auto insurance on our cars that are seperate… Does this let us to travel each others vehicles also? If theres an age limit to it”I had my vehicle vandalised and also have rang my insurance company. They said my car is written-off even though the color as well as the back display was just harmed