This is probably a terrible thing for me to say, but I honestly don’t think that they ID for morning EMH. I have never been ID’d.
And it’s not even that my room key is my park key - we have the 10-day no expirations that we use. For morning EMH, they don’t card you for every ride because they assume that the only way you’re getting in is if you are a resort guest. Perhaps only buses run from the resorts and none from the parking lot? I’m not sure. I just can’t remember every being ID’d to get into the park early.
So you might get there an hour or so before AM EMH in hopes of being chosen as the first family. And perhaps you could have a morning ADR at CP or CRT, that way you’re assured entrance into the park.