How are you going to get there?

How people visit different hard to reach places? Plane to the closest airport, then bus/train/car to closest town/village, then local helicopter/boat/landrover, finally your foots.

Or, if you are limited in resources, you could just look for a vacancy in that place and get a job. May be even in NASA division or its contractor running that Devon testing site.

And you think the sites are unguarded?

Heavy unpenetrateable guard on unhabitable island is a good sign that you are got to something. Only that fact will be a good reason to do more research. But I didn't find any info about strange appearance of numerous guards on Devon.

Sounds easy, just try it.

Did Taimyr, without problems. Why Devon will be different?

Then do Antarctica.

Antarctica is not a big problem too. At least from Russian point of view. Periodically they look for, f.e. IT specialists for work at Antarctic stations. Not a best salary, but it is not about salary, isn't it? There are no any special skills needed, only to be healthy, have minimum knowledge to support stations computers and network and consent to spend a half a year in a distant and cold station.

Current vacancies for next year: http://www.aari.ru/dept/kadry/rae.html (use online translator, it is in Russian, obviously) This time IT specialist not needed, but there are a lot of other vacancies to choose from. Not very popular job, really, some time ago they look for IT specialist urgently, even on IT forums and social networks, looking for somebody who will agree for their not very decent salary.