Disneyland has checked proof of residency before, for things like the SoCal passes, but I'm not sure how much of that is done at the gate and how much is done at the sale point. But I won't be surprised if they just ask for a CA DL or ID, which Adam probably has still. But I am kind of hoping he gets turned away. The CA only thing isn't a Disneyland rule, it's a state rule that is allowing the theme parks to reopen, Disney is going to do their best to enforce it to not get in trouble themselves.
I really did enjoy Adam for a long time. His RV series and the weird things he would explore were always super interesting. But his behavior and attitude the past year has been crappy. The move to Florida just to get access to Disney. Going coast to coast without quarantining, and even doing things like bypassing LAX so he can bypass regulations really show how selfish he really is. There was plenty he could cover in California while still following pandemic precautions, but he had to chase the Disney whale.