Last night I picked up an HDMI➡️ VGA adapter just in case I get to the event and find that the AV setup only has VGA. Tested that it works and at least with the local setup I don't need to supply additional power to the adapter (it has a warning tag saying if an image doesn't show up, apply more power). I want to test things as best I can before leaving the extra emergency computers at home.
The airline is now recommending showing up 2 hours before *domestic* flights because TSA is that bad now