I went by Grand Texas on 9-15-17 and took a few pictures of the RV park, Raceway and Empty land that is to be Grand Texas Park. There was nothing to see really as the drone videos show.
According to the local news all the "underground" work is complete and the Water Park should start above construction in a month or so.
You can see my pictures here : https://1drv.ms/f/s!AtlHqTe1z5vQkrYpJWb4i36Sp7Ke8Q
On a side note a Big Texan came out and asked what I was doing in the RV park without a sticker on my window. LOL.