Oh man are you echoing my heart. I feel the same thing, and I am also somewhat hedged -in by personal circumstances. I have made that a someday goal, but I am making lifestyle choices now that are impacting that.
I've kept a small garden at home: tomatoes, apple trees, beans, herbs. It's not enough to sustain me by a long shot, but it's enough to have a small harvest, and it's enough to trade with neighbors to create a sense of community. I cook for myself as much as I can, using as many natural ingredients as possible--explore your options! Sometimes, all it takes is one new, unexpected vegetable or fruit that you've never tried before. Ginger root has been a recent favorite.
I've also made myself very aware of my impact on the environment. I'm about to start a compost heap to be more responsible with my organic waste (and eventually use it in next years garden!)
Also, I've experimented with home-making as many things as I can. I recently started binding my own books, and that has lead to a great sense of self-sufficiency, as small as it seems.
Finally...get involved outdoors, as much as you can. Whenever I can, I am outside--running, hiking, exploring...or even simply sitting and breathing. It's hard, when you go to an urban college like I do, but there are ways to find the wildness of the world seeping through the corners of civilization. Parks are a lifesaver--if there is one nearby, explore as much of it as you can, finding those small beginnings of adventures that will help hone your senses and start speaking outdoor-language.
These are small, simple, silly-seeming things, but it is something. I know I can't get away from my present situation at the moment, but I can work to make change around me. And when I finally have the means to find that wonderful lonely place and live there, I will be ready for it.
If you're serious about this, there's no reason you can't start living Differently now. You can't run away from life--it's meant to be lived, even if our circumstances are less than ideal. If anything, the uncertain areas are where adventures are hiding. Mark Batterson once said..."Circumstantial uncertainty also goes by another name...Adventure."
...Wow I wrote a lot. Can you tell this is close to my heart? I hope this helps...and I hope you find your Adventure.