There are Ghouls around Jueno area, yes.
but they don't pop out as often as in Valcurm or the mine in Koscant.
Ghoul pops in Junger forest. The only spot i am sure of, is in I-10, I-11
in Junger forest. Walking trees, forest tigers, and Orcs pop in there too.
Deep in I-11, Bogy may pop out. so be careful.lv 30 can solo there, very safe.
But if you are lower than lv 25, better get PT.
However, i still think the mine in Koscant is the best play for the "Cursed Skull"
good luck.