Please dear god add fast travel to Field Labs. It is a nuisance when you get downed to have to run 600 M across the map just to get your backpack. 

create a lean-to and set your spawn in the area you expect to struggle

fast travel would ruin the spirit of this game.  Ziplines are good enough.

Zip lines are everything. I have about 3-4 zip lines set up and I wonder, it’s been 152 days in my tiny life and no one has noticed tiny structures popping up to the yard? Lol

Never do this.