Old maps (pre-statehood) show Sandtown several miles further north -- more directly west of Chouteau than Wagoner -- but that doesn't seem likely to me that Gano/Watie crossed that far north and then had to move a considerable distance southeast to the haying camp.
I found a link regarding Sandtown in this general area. There are two maps. The first a post-statehood map showing Sandtown northeast of Catoosa. The second must be a mistake, showing site on the Canadian near, I think, OKC. Follow the link and search the page for Sandtown. http://metaldetectingforum.com/showthread.php?t=14077