At this moment, I am thinking:
Option 1: 7D2 with 150-600mm, and 1Dx with 24-105mm. That should give me a good range.
Option 2: 1Dx with 100-400mm, and 7D2 with 24-105mm. I love pairing the 1Dx with the 100-400mm for overall performance. However, I'd lose range.
Option 3: 7D2 with 150-600mm, and 1Dx with 70-200mm (would 70 be wide enough to cover formation flight?). But then I would need a 3rd lens to cover the range shorter than 70. The 10-22mm would beg to come along in that case. This would be the heaviest option, too
Hmm ... maybe I am overthinking the whole thing!
At least the weather is predicting sunny sky for Saturday.