Usually cotton sundress and a cute pair of sandals - flats of course or maybe skimmers. Boy short underpants so no possible flashing. Or sometimes I wear a cute cotton skirt and a Tshirt or tank top. I like cotton but I know a lot of people like the moisture wicking fabrics. I do have some of those as well but not nearly as many. I travel with leggings and cardigans if we go in cooler times. We rarely go during the colder months. I really like the sundress thing as they all have pockets (if not bought that way, I'll sew them in) and a take a small wristlet. My dh can easily fit it in his pocket or I can put it in mine. I travel light in the parks and for travel purposes which is another great part of sundresses, even if you pack 2 a day and a different swimsuit for everyday they fold up very compactly to leave more rooms for shoes. I find wearing different shoes a huge factor in keeping my feet happy

so, this means my clothes dry fast, I sweat very little, have minimal luggage, never chafe (my legs rub when I wear shorts, but not when I wear a dress/skirt which is another factor) or have blisters and I look nice enough. I now wear a wide brim hat to keep the sun off my face and shoulders and sunglasses.
I wear sunscreen, moisturizer with sunscreen and face makeup with sunscreen because I've had a couple of pre cancerous skin issues and it runs in the family. A tiny bit of makeup (probably takes about 2-3 minutes for a bit of blush. A swipe of mascara and tinted Chapstick). I start the day with my hair down for a pic or 2 going into the parks and then as soon as it gets hot, I'll braid it, put in a low bun or whatever while waiting in a line. I love the look of a high pony tail but as I get older the big hat is more important
I wish my hair got frizzy or any kind of curly. Mine just gets limper and limper and more and more stringy...lol.
Basically, I try to look put together but I'm not willing to do that at the expense of comfort, so this works for me. I wish I was one of those women who had the perfect hair down and did the whole makeup thing and touched it up all day. I get too excited to get in the parks to spend too much time (I even iron our clothes in the evening so it's even faster to get ready in the morning) and the only mainentance I do while in the parks is more Chapstick.
Pretty much all girlfriends dress similarly especially with golf skirts/skorts.