patagonia tours in july/august

Hi everyone

I've been trying to find a budget tour that goes for approx 1 week or less in Patagonia - I'm mainly interested in seeing the Perito Moreno Glacier but open to all other things depending on time. my problem is that i can't find any tours (gap, intrepid etc) that run during july/august in Patagonia. Does anyone know of any other tours that do run during that time? I've been having a look on the internet but no luck except for quite pricey/luxury ones that i can't afford. is Patagonia something I could do independently if i'm not really a camper/trekker?

thanks for your help!