I have specific hardware and software that I use for these presentations, so I will need a projector or large TV screen that I can plug my own laptop into. Using another laptop won't work. I have cords, but I need an available HDMI or VGA connector. (I can handle it myself and put everything back the way I found it afterwards if that helps.)

Important: If we are using a projector, keep in mind that the deepest black you can get is the color of the screen when the projector is off. In most rooms, that is a light gray during the day, even with the lights off. You should make sure that the room we are in can be darkened with blinds, or even cardboard over the windows, so we can get a black background for space images. They look very unappealing if they are washed out, and subtle details disappear. (It is less important for dinosaurs and meteorites.)