Hay Joe
You are not the only one to have done this

That is why I have always have a extra key hidden in one of those little magnetic boxes in my Camaro.
Just used it the Summer before last at a Tuesday Cruise night 40 miles from home. After returning from the on sight restaurant I realized what I had done. No problem, I had the magnetic box, problem was it took me 20 minutes to find it

By the way cool Nova
Mike