It hardly unlikely that someone would steal something while you far away in wild exept he has buddies who would stalk you and while you are away they inform others to steal from you but when you look at it like that you see that chances are one to 100k. Belive me biggest thret is exposure. Bring good clothes and always let someone know where are you going. And whatever happens dont ever panic. Camping should be nice experience so if you dont make stupid attempts doing risky stuff without real need you should be fine. If you go to areas with bears and wolfs bring lashlight and bearspray. But real defence against animals are safety measures and being smarter than them, cuz thats what we have, brains. We are not ment to fight physicly with them. So real defence is store away food, be loud, make nice fire, sing, have night watch in shifts, pairs usualy do good when guarding camp because when one person is only wake theres big chance he/she will panic and no one will have good night sleep.