My niece (who lives in FL) told me she was turned away at the parking lot last Dec since she was not a registered guest. She had planned to see the gingerbread house. They would not let her park her car and enter the resort.
While we take Uber often all over WDW, some security guards are more strict than others. When arriving at the Beach Club, they asked to see my husbands magic band to verify our reservation. We were also asked to show MagicBands when returning to our resort after midnight by Uber, but that didn’t surprise me due to the time.