The only way I could do it, at my skill level, would be in bits and pieces. Where I walk between the points of where I could park my car and walk forward and back over time until I completed the trail.
I was just wondering if they dig up roots and berries and drink from streams from their endeavour?
Use Beet Juice or Beet Kvass and Natto.
On the actual trails you might have to check a local plant guide.
More like freeze dried meals.