so -- just a tad bit of digging will let you see that they've left some wordpress directories unprotected (amateur move). forrestfenntreasure.com/wp-content/uploads/ which also will show you that they initially set up the site in 2018 despite the comments on the site. A little further digging will reveal the login names and email addresses of the site creators which are all of Indian origin... not sure if in US or overseas. Googling those names shows dozens of similarly configured wordpress sites which suggests that they are merely site builders for a client. Emails went unreturned.
That said -- the 'canopy of stars' being the US Flag aligns with my beliefs about the hiding site. But this site is older than claimed.... not disqualifying, but not perfect either.
New post there with a hint as to the word that is key.
I think it was registered in 2018 because the author/finder believed they were going to find it in June, 2018, but were prevented from doing so by high water—hence ff’s gut feeling comment. I also believe, like others, that the person had to travel internationally to find the TC, and was not rich, hence the delay into 2019. The English used in the posts (tone, style) sounds like upper South to me; perhaps the person is originally from there and now living outside of the US (there’s a UK or Aussie word choice at the end of the latest update). All IMO.
Did they say they were male? I don’t remember that. Ff said the ‘finder‘ (buyer? retriever?) is male.