If you don't want to return to The Dregs only to harvest more Glowing Goop or Reptile Hide, you can get these crafting ingredients somewhere else on the map. Besides this dungeon Komodos and Abysmal Remnant, you can harvest Reptile Hide from several other Exiled Lands (and Isle of Siptah) reptilian creatures as well (Crocodiles, Cobras, Snakes, Serpent-men, etc.). Use a Fluid Press to get some of this hide by putting Crocodiles, Komodos, or Salamanders carcasses inside it. Glowing Goop grows in other parts of the Exiled Lands map (also in the Isle of Siptah), making The Dregs a non-obligatory area to collect this aquatic plant. A more detailed guide about Glowing Goop is available here: Conan Exiles Glowing Goop Guide.