Hornstrandir: Mountain passes are still full of snow and many of them impassable. No conditions for hiking/camping.
A lot of snow on Fimmvörðuháls trail. Snow and ice on Heljarkambur, winter equipment needed (crampons, ice axe etc.)
Very little fresh snow on the glacier after the winter, big open crevasses. Very difficult conditions. Hiking there not recommended without experienced guides.