It may be tricky to reduce the hot spots, because with blowouts, there is no more color information to work with. When you try to burn spots like that, you are working with pure white. You could darken it a little with the Burn tool, but it may not produce realistic results like you want. So, there isnt much more you can do with those areas.
The best thing to do would be to get them in a shady spot where you have some nice fill light or kickback light coming in. Then you can expose for the light that you have available, rather than compensate for the bright sun spots afterward. Its always easier to edit a photo with fairly decent lighting than fixing something later.