It seems your content could hold in one page with a little help of ajax.
Also, a bit of jquery animation could bring a modern touch to the site.
Photos should be of better quality, because they are the focus point of your site.
I needed to actualy guess what the site was about, that information should be the first you receive, before even having a look inside the site.
I believe this is in Patagonia, nice region, so more pictures to attract visitors attention.
If the clients are mainly from south america, you should pay some attention to gracefull degredation, because I don't think everyone there has access to the last generation browsers.
For the rest, success with your site, it's a nice subject that leaves you all your freedom to exploit your creativity.