Yepr... the hamburger (humberger? lol, or is that's what it's called?) casserole was also in the '69 book too!
A lot of tried and true recipes there!
Let us know how it turns out!

Most times, with any crockpot recipe, we add a bunch of ground flax seeds (2-3 tbsp.)...
they are tasteless (so doesn't alter the flavor of the original recipe), add some thickening, and are good for you! they add a LOT of fiber!