I bring my 8" LX90 to the public and they are amazed too. My experience told me that we better setup our scope half to one hour earlier than the event time so that you can figure out almost every glitch before they turn out just like what I had yesterday night. The wire from the power tank to the scope is loosen and made the scope suddenly out of power when it slew to a certain direction.
I am quite sure that simple mounted telescope (altazimuth or dobsonian) is a great option when it comes to public outreach so that people will not be affected by the "no, I don't have the buck to get this monster" thinking.