I've recently added raw oats to my contest diet. One effect I'm noticing immediately is that it seems to dry me out a bit.
As for how I eat them, I throw half a cup of oats in a spice jar and munch on them while at work. I try to save the vast majority for the end of the day closer to my workout. Honestly I love the taste. I don't like plain oatmeal, but raw oats have a really nice nutty flavor. It's almost like eating unsalted peanuts or something.
Btw, I don't understand why people rave about steel cut oats over rolled oats. Steel cut oats are denser. In fact they are twice as dense as rolled oats. 0.25 cups of steel cut oats contains the same macros as 0.5 cups of rolled oats. Calorically dense carbs tend to be higher GI; I would think that would be bad news for steel cut oats.
Oh btw, if you eat the oats without boilng them, it has several benefits. In order to process them, your body has to soak them in water anyway. If you boil them, you've alreayd done this for your body and thus saved it some energy. If you don't boil them, your body has to expend extra energy doing this as well as cut into its own stores of water. Thus, eating raw oats can and typically does decrease subcutaneous water retention.
I definitely plan on using this concept to its fullest during my carb loading phase for my contest prep.
Oh, and post contest, raw oats will definitely be a regular part of my diet. In larger quantities though, obviously. One cannot gain appreciable muscle mass on 100 grams of carbs per day!