Hi Kai,
Argentina and Chile offer great locations that have wonderful infrastructure and lots of snow. Late August is a great time to shoot.
I also want to throw out another option, just in case–salt flats in northern Argentina and Bolivia. Depending on the look you want to achieve, this can be a great option and you will have wonderful blue skies, so no weather days! Easier to shoot in a salt flat than snow field, no people, and “snow” (salt) as far as the eye can see. I am attaching 2 photos of this option in Jujuy.
For snow, you have flat land with the Andes mountains in the back in Mendoza, Argentina (wine country), this is the 3rd photo, and snow throughout Patagonia.
We have an extensive network of production pros who are experts in different locations with many years of experience, and a native English speaker will be your project manager.
we will be sending you an email on Friday with more info and questions.
cheers, Ginger Gentile
http://www.santelmoproductions.com
skype: Santelmoproductions
blog: http://filminginArgentina.wordpress.com