u look at what you might need to do, pick the tools accordingly, and if you can't get the tool to the job, the job can't be done. You start with the most wt that you can run and gun with, and you work backwards from there. You CAN'T just "avoid" bugs, cold, heat, thirst, hunger, etc. So you HAVE to deal with those things. If you have some space and wt left over, you add the most versatile, capable guns and ammo and armor that you can manage. As fat smokers, you might as well just crawl into a hole, or commit suicide.