Firstly, thanks so much for creating this hunt, which is free and has a generous prize. It's good to think there are people prepared to give us all some fun this way. I'm missing spending time on the Fenn hunt, and you're going to help a lot. I like the way the prize can go up too. ;)
You probably can't answer any of this, but I'll give it a go anyway!
1. You mentioned the Ring poem will tell you how to decipher the keys. What are the keys? Is this a word, a number, a phrase or something else?
2. You said the full solve should consist of the city it's in, but you always said the poem starts in the city and ends in the mountains. So the beginning is the end? This is curious.
3. Why The random Caps? Do some words Having capS mean someThing? Or do trickery Gods just have fun that way?
4. A dolos is a reinforced concrete block in a complex geometric shape weighing up to 80 tonnes, used in great numbers as a form of coastal management to build revetments for protection against the erosive force of waves from a body of water. Is this all part of your trickery?