Richard.
I took all my money in cash ..(mad I know) I dont know if on your paperwork there is mention of extra trips in HKG there was not on mine so I ended up putting two trips = £ 138.00 on my credit card. So beware you might need extra HKG dollars for that part
Also most of the flights as in Helicopter or sea plane the tour company that runs these does take credit cards for these payments. I did not do the sea plane I was down for an extra air ride for whale watching but this did not happen due to poor weather I did manage to do helicopter over fox glacier and land on that FANTASTIC!!!! ..
So when we got there there actually were 3 more trips as well the whale watching one by air, a wine tasting tour visiting 4 winery's and another to the antartic exhibition.
SO BE aware there might be even more extra's to go on.
Regarding the travel plug it's the same as the one you would use for USA.. two pin but looks like angled flat pins? does that make sence. I have one adapter but its universal so has two or three options.
Just be aware that with the flight extras these do not happen unless the weather conditions are good. But if that's what you want to do allow the money for them.
There are hairdryers and irons etc in all but one hotel, and laundry facility's in about 3 or 4 hotels for you to do washing. As you cannot pack for all the days or you will be over the limit. When there are the 4, 1 nights in hotels we packed a holdall so we didnt have to keep draggin the case on coach and off every night made it much easier. So might be worth chucking in a holdall bag. Then you can use it for hand luggage on way home with all your gifts?!!
Cindy