Let's see, I was whisked out of Bavaria at an early age, so I have no idea.
Looseheadrop- I love the map, where do you get them?
For your actual positing, however, I think it's slightly unrealistic. I'm going to research the War of the Austrian Succession more.
The current "would be" king's father was politically active I understand and the family is well regarded in Bavaria according to wikipedia. Interestingly, he is also the "jacobite" heir to the Scottish/English crown.