I can't really answer your question, because I never make mine in the crockpot. I soak mine overnight with approx 1:2 oats to water plus a splash of whey. Swirl to mix, leave out overnight. In the morning I cook it on low gas flame for about 7 mins, stirring a few times.
If I were to use the crockpot, I guess I would soak the same way (in the pot) and then turn it on high when I got up in the morning. (Hmmm, maybe I should try this.) I suppose cooking time and whether you used high or low setting would depend a lot on how much you make and how soon you need to eat after waking.
We eat ours with different toppings--fresh or dried fruit, spirulina, molasses/maple/honey, always butter, sometimes nuts or seeds.
Hope my non-answer answer helps. If I do the crockpot thing I'll let you know what I end up with.