I found just 4 out of 5:
-SE dock, over barrels
-SE-E barrells place with awning, behind barrels over a small rock
-nortwest big rock, in a box, getting out of reaper building until bridge, then just point left for NW-W
-under big fence structure on SW, W most part on corner behind rock
Where is the one i am missing?
Any help will be welcome!