This site appears to be a transport and forestry company with a few original buildings mixed with newer structures and a transport trailer loading facility between the surviving site and the main road.
I arrived at the location on a weekend and was unable to locate and contact the site owners to arrange site access thus my images are limited to a few drone shots.

From Secret Scotland Website, PoW Camp Summary WWII:

• Was situated about four miles south west of Dingwall, north of Inverness on the east coast.
• The castle was built by the Mackenzies in the 17th century but was demolished in 1953.
• Originally built as a Training Camp for the Canadian Army, its timber huts housed first Italian, then German PoWs.
• A few buildings are reported to remain, but in poor condition.
• A nearby beech tree is said to have an Italian name followed by the letters PoW carved into it.