Holiday self catering - what do you always forget?

One of my favourite places for a long weekend would have to be Murramarang Caravan Park.  Located in a national park with a beach thrown in for good measure,  is certainly a winner for me.  We generally book a cabin of sorts as the idea of camping doesn't appeal to one of us in this marriage - that one being me.  What's wrong with walls and a proper bed I say?  Whenever travelling and staying in self catering accommodation I try to pack all the essentials.  Food mostly.  And enough to cater for most of the park including the kangaroos.  Although the signs about not feeding the wild animals is valid, it doesn't get much compliance as they've been known to steal the odd pizza slice and can go a hot chip on any day.  Bad! I try to prepare my own food to avoid costs of eating out too much.  Pizza and hot chips aren't good for kangaroos, and not fantastic for us either.  I usually bake a cake, cook a casserole and bring fruit, yoghurt, bread and weatbix.  I'd like to consider we travel light although travelling with an electric frying pan, 25 fishing rods and a tea pot wouldn't really work with just a backpack.  I still haven't mastered the microwave and hold a deep suspicion of it so to cater for all meals takes an exercise in precision planning.  Like a major expedition in the making, the lists get written, lost and re-written again.  We tick it all off on the morning of travel and at some point during the unpacking someone will say - did you bring the milk?  Holidays, so relaxing!