Although pax comments don't seem to be welcome on this thread for some reason, I'm going to have one more go. My main experience of "unusual" airports has been limited to Orange County (aka John Wayne Int.) and Firenza. Both of these require max energy take-offs in certain circumstances, which are outside regular pax experience. On each occasion I have done this, the captain concerned has given a brief, factual explanation of what is about to happen and why. Result: comforted customers who did not feel the urge to complain afterwards about something unusual.
I believe that passengers do appreciate relevant communication from the flightdeck - just make sure that the aircraft PA system allows it to be heard (by no means always the case....).