I have a pretty large show coming up where I'm going to be supervising the audio team in a corporate av environment. We're using an M7 with a 500' digidesign profile snake. I know that digital consoles can have issues with head amp control through digital snakes. Is there anything I need to do to avoid any potential issues?
Yes, you need to use Yamaha products with Yamaha products. They are not interchangeable.
Nothing in the Yamaha universe uses BNC snakes (the kind AVID/Digidesign uses between the Stage rack and Mix rack). Yamaha uses CAT5e. To get remotely digitized audio into the M7 you will need compatible MY-series expansion cards in the M7 and the corresponding remote mic preamps - Ethersound or Dante via Yamaha RIO.
I respectfully suggest you are not qualified to specify the system and should have someone with more experience handle this part.