if you read the block management hunting access guide, there are certain properties that seem to be more popular and access to the is given through a lottery. I'm looking at page 134 of the BMA access guide right now, under region 7, property number 416 Brewer Ranch, it states "reservations...
I'm not sure if that is the actual name of the Ranch, but the BMA booklet calls it 416 Brewer Ranch. On X has it listed as Brewer Ranch as well. Its basically just due east of Powderville on the east side of the Powder River. Looks to be about a 1 hour drive from the Chalk Buttes area
my brother and I got approved for 3 days on the Brewer Ranch this year (November 14-16) under the BMA program. We were planning on camping near chalk buttes and hunting the ranch, then hunting chalk buttes if we dont fill our tags on the ranch. I'm hoping there is plenty of rut activity at that time