Here is a fairly thorough discussion of the choices made regarding the British soldiery depicted in Michael Mann's 'Last of The Mohicans'- with specific reference to the 35th Regiment at Fort William Henry. Some less reliable remarks regarding bearskin grenadier caps.

https://www.reddit.com/r/badhistory/comments/2brk7m/the_35th_regiment_of_foot_in_michael_manns_the/