Vehicle security for long road trip

I've spent a considerable amount of time thinking about this exact problem. I want to road trip my car someday but even before that it will my summer drive just like my Challenger was before I sold it. Love to take the wife to dinner or go see a movie and be able to have a reasonable chance the car will still be there when I get ready to leave.

Not to say I have the perfect solution (there isn't one). Only that I understand the dilemma.