If the life of a Cavalry Trooper in barracks was "Terrible hard", then life on campaign was all that - and more. Not only were the usual duties of tending and feeding the horses strictly adhered to, but pickets and videttes had to be provided, cook houses built, latrines dug and tents looked after.
The 1831 Cavalry Regulations and the Standing Orders of the Scots Greys state that on campaign pickets (in-lying and out-lying) were to be posted one hour before daybreak. An outlying picket, or vidette, consisted of half-a-dozen mounted troopers under the command of an NCO to observe the movement of the enemy and also mask their own unit. The in-lying picket was larger, commanded by an officer, and as the name suggests, placed closer to the camp. Captain William Douglas (10th Hussars) wrote that ‘An Outlying Picket ought to be concealed entirely from observation, either by natural or artificial obstacles.’ Whilst an Inlying Picket ought to be within sight of the camp.