Custer isa good place to start make sure you bring clothes for the cold and snow and also for mild weather you can have either of these weather conditions from day to day bring some good binoculars you may spot aflock in the distance, determine the travel route and position ahead of them and setup this is agood tactic on merriams they like to travel so bring good boots like Adrian said bring a boxcall or alongbox with volume the country is big you should extend your stay and hunt the wyoming Black Hills also tags are over the counter and cost around 70 dollars asfor atv i have not hunted the S.D. black hills since they went to applications a few years back you might want contact S.D. fish and game i hunt Wy. black hills evry year and they shut down ATV use on many of their closed roads