Re: "Then this'll be your big chance to get away from it all."
The first one, "a chance to get away from it all" is just an old expression. I don't remember it, or the other one being from any comercial or being a buzz phrase of the time.
People still use that expression all the time (in the US anyway).
"Live long and prosper."
-Abraham Lincoln to the train conductor at Gettysburg, PA Novemember 1863