Likely less than a hundred, but really it's more of a matter if people want an Elite to fight, they'll have one. Bil will have no intelligence on them or The General showing up, so it'll be a bit chaotic.

I'll have a log up and will be tagging as him, so there's a good chance he may talk.

That is definitely possible. It would start flooding until either the characters found a way to plug the hole or, eventually, a Shift will automatically close the breach.

Also, since the timing with this is going to be tight, feel free to assume that if Albert goes asking for deets, maps and the information above will be available, save for the details on reinforcements.