Water may be scarce at higher elevations. The arctic tundra is underlain by permanently frozen soils which act as a barrier to draining water and creates extensive wetlands. Clumps of tundra sedges called tussocks create unstable footing that frustrates hiking. Streams and rivers can be cold and dangerous. Know the proper techniques before attempting to cross them or change your route to avoid dangerous crossings.
Animals are wild.
Keep a clean camp and use common sense. Cook at least 100 yards from your campsite. Use bear proof food containers and store them away from camp and cook areas. Carry out food waste. Take every precaution to minimize animal encounters.