Little by little try to sneak your way into the range you need to be into by getting into their bedding or feeding area before they do.If you don,t have cover or other natural ambush spots to close the distance,try a blind set in where you need it or try doe and fawn bleat calls.If none of that is possible you will have to set up down range from where you see em where you think they will wander to when they continue on.Good luck and keep us posted.You can get a cheap speed blind if cost is a factor.