Any chance of getting sick and catching illnesses from the environment and weather?
Like back in the Pen and Paper Days of the early 80s , in Gamma World(a game that's world and setting kick the ♥♥♥♥ out of Fallout)
when the party was traveling every certain amount of distance , the GM would roll percentile dice to see if anyone caught something...
normal weather and terrain had a tiny 2% chance , other terrain types would increase that chance...and weather would increase that chance
as well...all by small amounts , but the more time you spent in hostile terrain and or weather , the greater chance characters had of getting ill
Its just a minor thing , but applying sickness debuffs to the player for things like that , could add to the survival aspect...or just annoy people and give them something else to female dog about!