I guess it depends on the facilities where you are staying and how you are planning to set up while there.

Does your hospital provide things while you are in hossy?

Does the house your renting have washing machine and dryer?

Nappies - allow up to 11 nappy changes a day for a newborn,
clothes - we would go through up to three outfits a day - more once they get those explosive newborn poos happening.
Blankets/swaddling - depends on the weather but we would go through probably 2 a day, you might want some chuck rugs/terry toweling nappies for burbing and cleaning up messes
bathing products I wouldn't worry - just use water
towels and washers - again depends on if you have a washing machine but maybe 1 towel and 2 washers per day

If it was me - I wouldn't worry about the gadgets unless bub is going to be sleeping in a seperate room

A friend of mine is out here at the moment after coming out at 28wks to have bub and I can ask her for some more info if you like but she has been staying with her parents so a little bit different.

Good luck - hope everything goes well