Fish should be OK. They go that long w/o food when they are shipped. There might be more aggression. If you have a non-aquarist feed them, make sure to portion out the food and hide the extra. 'Civilians' tend to want to feed lots because the fish 'look hungry'! :thumbdown
Corals, on the other hand, need the lights ON!
How are you going to handle top off?
You might want to hook up with someone here (WCR) for skilled emergency assistance.