What does it matter that Red Court know where the portal is? If my proposed design is implemented, they still won't be able to find it, or pass through it, or attack it or our facilities in close quarters. Because when they approach the area, they'll forget their targets exist, and will stop being able to recognize it.
Mundanes are a big enough problem already. Nothing is stopping Red Court from trying again. Red Court has already, essentially, declared war on Winter by Nfecting Mab's second in command and Winter Lady. Unless he's fully deranged, Red King has to realize this. So, I doubt they will stop with the attempts to provoke mundane military response. I also expect to see narco cartels to be sent against us.