The dawn phenomenon is just your body taking the opportunity to use up some of its stored glucose.
If you haven't eaten anything and your glucose levels rise, that glucose is coming from you, it's not new glucose, it is just your body moving energy from storage in your liver, to your blood.
It's how our bodies have evolved to efficiently store and use energy.
It seems to me to be quite pointless to try and stop my liver doing its job, after all it has been doing the same thing all of my life, I was just unaware of it until I became diabetic and started testing.
The high blood sugar is not really the problem, it's just a symptom of our insulin resistance. Trying to fool our livers into not using our stored glucose with protein snacks or alcohol the evening before, could possibly make our numbers look better, but will do nothing to improve our insuln resistance .
The whole point of fasting is to use up the excess glucose, as the glucose stores dwindle so will the insulin demand. Low insulin levels result in fat burning and hopefully improving insulin resistance.
It takes a long time, you can't fix it in a few weeks, or even months. Concentrate on keeping as low carb as possible, try to avoid filling that storage up, put your energy into something you can control, your diet.
Your liver is going to do it's job, try to work with it by reducing how much sugar you force it to store, not against it by trying to stop it.