Was pretty easy although one of the people from our group had a slight bit of trouble going through multiple pickaxes. First of all make sure you have the quest active.
Logging - Ghelsba Mining - Yughott Harvesting - West Saru or Giddeus
To make it easy we had full inventory, then just HELM'd on the one spot until we got the key item. Since you're full you don't obtain any item from the point and therefore the point won't move (meaning you don't have to spend half an hour looking for points). You can get it regardless of if you find nothing, cant obtain anything because you're full and your pickaxe breaks.
I did all three key items after getting the mission in my log.
25 attempts on harvesting / logging. Several pickaxes broke during mining. One or two during harvesting / logging. Girlfriend was more fortunate. How long it takes seem to be random.
Just be sure to use the full inventory trick.
Edit:
Logging - Ghelsba (there's two/three spawns in the first wide area) Mining - Gusgen (not too far in) Harvesting - Giddeus (tons of points and multiple ones can be up at the same time)
I wish I would have know about that full inventory trick >_< would have saved me lots of time.
That's why I was shouting when I was in zones with other people trying for key items. And it's hard to get people to believe you, as well. A lot of people think you're just trying to screw them over to get spots for yourself.