I think it is legal to breastfeed anywhere at all that you want. I don't think it is legal if you are not breastfeeding - like just letting them off the lead in a park or a non-nudist beach ....which I think is a shame. There are so many females just wanting to let it all hang out what with the terrible hot weather and humidity we have been having. And after all, it's a really good look.
I would not sunbake topless at all but I respect that other people choose to do so. I would certainly prefer them to keep to designated beaches. The problem I see with a public park is that people who may be embarrased by this can come upon it unwittingly.
Absolutely it is ok. Males have breasts, some large some small, but all are exposed. Some women have large some small, yet it is deemed wrong. This is double standards and discrimination. Breasts are a natural body part, non sexual in general terms when the discussion is about topless bathing. Children are brought up suckling the breast as a food dispenser, not as a sexual toy, and if it is good enough for children for their first few years, then it should be ok for the next forever. Parents, it all start with you now, stop being wowsers and blind to Gods design, get your own mind out of the gutter, stop being so insecure about breasts, stop discriminating between the sexes, and stop worrying. There is way more harm in the deviant trying to sneak a peek at a covered breast, but no one looks a third time for the wrong reasons at the bare breasts in a modern society. Nudists do not care what they or YOU look like, as we are accepting of everyone in nature. Get up one day and stop swearing and actually make a positive social difference for the children you are so trying to protect.