Are there any good size rooms (odd shaped is ok) at the Grand Californian Hotel to accommodate an EVC?
If you get an accessible room you should be able to bring one in. However, most people, including us with 2 ECVs, just plug them in in the hallway. There are outlets every so often and as long as you bring your key in with you no one will bother them. Just try to park them close to the wall etc. This is true of most Disney properties.
Definitely saw plenty of EVCs parked in hallways at GCH.
At GFH the porter actually told us that’s where we should park!