Where do u find houses to rent for summer holiday?

[NEW]

Hello Guys

Planning on going to the states in July.
While i most of the time travel alone, i am planning on bringing my family this time.

I am looking for a house to rent for 3 weeks in July. I where thinking of trying to get a house around the lakes in GA, lake lanier etc..

Is there any website in particular that is used in the states to channel this kind of services?

Here we have a couple of sites that is typically used for this services..

If you know someone having a really nice place that they rent out, in a location with a nice climate during july, i am open for alternatives, close to water...

Any help is appreciated.

Nils