Vaped at Disney World with no problems in February, but I have heard some castmembers have started shooing vapers to smoking areas.
I do know Disneyland and California Adventure are vape-friendly (I'm at both a few times a month), with the exception of the Trader Sam's bar at the Disneyland Hotel, who has some castmembers who are insisting that people either stop vaping or leave. I just don't go to Trader Sam's anymore.