First of all, apologies for the rather dumb title. The thing is, I'm mostly a Morrowind player and thus more used to the dice-roll combat system that relies on character's skills, than to Skyrim's system that relies on player's skills.
However, I find that while I can beat bandit chiefs (admittedly on the lowest dificulty and depleting my entire potions reserve in the process), I keep being whacked by Mother Nature, i.e. smilodons, bears and snow trolls.
I'm currently level 11, so am I just too low-level to wander off the road, or is there some game mechanic I'm not using properly, or am I simply too carefree ?