LMAO, I actually skipped the Lake Monster quest because in my head I was like, "This is such a scam. I'm outta here." So, I didn't get the hint for the Misty Forest, and then I realized near the end of the game before the Wraith quest that I should get some mithril equipment just in case. Then I went into the Misty Forest and after some experimenting, I realized the rocks were next to the correct path and assumed that was the hint lol. It wasn't until I beat the game that I went back to finish the Lake Monster quest and finally realized why there was a "hole" in the story about the relationship between Mappi Village and the northern one.
It's kinda hilarious as to how this got so convoluted without me realizing it. Not to mention I recovered the first orb (probably early like you mentioned in your comment) from the first ruins. But I really enjoyed the main story, and the Wraith ending was pretty funny!