As a south African you pay US$ 20 or R200 to enter the falls. Pay in US$ its cheaper
Not sure what you mean about walking behind the falls. There is only one footpath and that is in front of the Falls.
Yes you do pay to hire raincoats, this can be done at the entrance.
I suggest you have a look at our activity's page click here to see what else there is to do and also look at the price list to give you an idea of the costs.