In normal times I would say cab to the baths with kids that age. I would not worry about it now. Take a close in ball and dinghy the kids in close and toss them in! Take the dinghy to the dinghy tie down and swim in. If it’s a typical June weather day the baths will be like a swimming pool. There are cool little pools young kids will have a great time in!
It’s on the way to Leverick so you can always pull in and check things out. If not to your liking fall back on the cab option.