I know heaps of people who just draped on old school cloth nappy around them when feeding to make themselves feel more comfortble. There's also the mumcho poncho's, they are pretty and descrete.
I found that i didn't go out for weeks and weeks and weeks (c-sect) anyway so it didn't matter what I wore as there was no-one around to see. Often found it easiest just to strip down to bf bra on top and go from there.
In most malls that are newish/down up, the feeing areas have seperate cublicles with curtains if that helps
Never had enough milk to worry about spillage, squirts or the like. Some people get it others don't.
I'm thinking of waiting till bubs arrives to see how bfing goes this time round and then will get one nice "out" top for feeding if all goes to plan.