I know the main constellations and have used the North star to navigate if that helps, if anyone has a digital camera that allows an open shutter for more than five mins, I could show exactly how the stars move across the heavens etc. To be honest it takes all of about 5 mins to show where the north star in relation to the other constellations, after that you will never forget them so it wont take long.
I'll also bring copies of star charts that people can take away. If there are too many people, I can always email them a pdf version when I get back.