A couple of questions - Need help please

[Hyvel]

You'll visit Riftland much later. The "most powerful wizard" and "mad mullet" quests are also not yet possible, you'll get to them later. I think you'll also get more visitors for the pub owner later, although I'm not a 100% sure on that one.

However, I do think you should be able to find all the chests for the pirate treasure quest...I do think it was in that cave somewhere.