If it might have an adverse effect, don't be seen. Both members of the team must be aware of their priorities when the suspect is in the sights. The sniper will maintain target acquisition on the greatest threat. Once the Sniper Teams have been assigned or chosen their position, they must then consider routes that will take them to that location. Cover is protection from small arms fire.
Concealment is protection from subject observation.
Use terrain which will allow you movement during the hours of darkness. Try to avoid rocky areas or areas of heavy vegetation. Don't automatically dismiss difficult terrain. This may be your best choice of approach in terms of cover and concealment. Especially during daylight movement.