from july to august, is that enough time to process visas, etc?
It depends on what kind of passport you are travelling on. For example, an Australian passport holder does not require a passport to enter Greenland if travelling for up to 90 days within the country. Same for US citizens and many other nationalities.
Might be worth checking the visa requirements on: http://www.visahq.com
Hope that helps
Lisa about 5 years ago