I am not aware of any sources detailing the uniform of Cannon's Irish so you would have a free rein on that... maybe grey or red even. On the post Killieicrankie subject I did a scenario artilce for WI around 12 years ago featuring exactly such a battle... I called it To Die for the Stuarts it had ...
If you are up the West Coast and at Fort William you can get a Gondola up Aonach Mor. I have not done it but i will the next time im up. It's meant to be simply stunning the view that you get. http://www.nevisrange.co.uk/gondola-info.asp I as recently camping up in the Morar and the sitting on Camus...