It's a little too early to look. For August now, we normally have to look only about 30 days out.
You can check this link for Park Glen
You can check this link for Parkwood Hill
I don't see any currently....in these two neighborhoods.....
You can also set up searches on our website for these specific neighborhoods, or searches by schools, or probably a better idea is searches for all of Keller. Inventory is very very tight right now and you may need to broaden your search area as I found only two rentals in Keller currently under $!650.... you can see them here: