I really like solving Tibia's quests myself (or with just hints). Usually, if not by brute force, they can be solved with logic and literature knowledge.
Considering the Outlaw Camp Quest, the are some initial hints:
- Snake Eye points your attention to this abandoned place,
- From other quests you know to compulsively click on every dead tree and will find the keys.
- Getting the golden key is straightforward: the cause of the flip is very close and intuitive.
- Using a power ring to flip the switches: 1) it seems to spawn at the "outside" mill next to the fires, 2) the switch next to orcs is making "puffs" on the counter, thus demanding a sacrifice, 3) power rings, oil and booze are the first thing that symbolize Wild Warriors.
However, how one may reason to plug the hole in a wall with, out of all other things, a barrel?! I haven't found anything to suggest such an attempt by neither talking with NPCs or reading books. Exploring every reachable place in the Camp, I haven't found any "example" of this mechanics.
How was this quest originally solved? I don't believe people were trying random items, as the switch may be used only once. So, the hint must be somewhere there, but I'm missing it.