I'd certainly be carrying diversion fuel for suitable alternate during the peak periods, regardless of what the AIP SUP/NOTAMs and Stop Press say. I wouldn't be surprised if the major carriers operating into POM over the period cancel plenty flights once the rest of the world starts to descend onto AYPY. Single runway also doesn't help, particularly if the weather goes to crap or they end up with a disabled aircraft on the runway for any extended period of time.