Hi Jenny,
I don't know whether you have found the marriage for Charles Young and Ann Stone. If not, it was 25 April 1791 in Winterslow. There is no indication from the entry that Charles was from Winterslow.
Winterslow PR has not been extracted into the IGI by LDS. Therefore all IGI entries were submitted by church members. In my experience for Winterslow, if the entry has an exact date it is correct, otherwise it is a guess. Winterslow baptisms are now available on familyhistoryonline but of course you have to pay.
Charles was buried 13 Jul 1832 and his age is given as 67, thus supporting a birth around 1766. I am now convinced that his baptism was 7 May 1769 in Laverstock[recorded in IGI] and that his parents were Stephen and Esther. I come to this conclusion because there is a marriage entry [by licence] for Stephen Young of Winterbourne and Esther Rogers in Winterslow PR for 1765. On the licence he is Stephen Jun. Young of Winterbourne Gunner. It seems possible that Charles was born during the move to Laverstock and was baptized later, although after his sister Sarah in 1768. It could be worth looking at the parish register for further information.
Hope this is useful
Colin