With public transport you get from Nova Gorica to Trenta, "summer" bus line from Nova Gorica over Vršič to Ljubljana and back, runs every day in July and August. If driver is in good mood, stops at the hairpin where road to Zadnjica branches off. Time then 8:00 am, nicely slowly up Zadnjica valley towards Dolič and to Triglav, descent and overnight at Planika or Kredarica, next day nicely "touristy" to Bohinj (through Voje to old Fužina shortest).