Dry weather may be an advantage for hunters in some cases. For example, if 80% of the water holes are dried up, I guess that means your elk are going to concentrate to drink in the remaining 20% of the water holes that are NOT dried up. Likewise, if 80% of the vegetation is in bad shape due to the drought, that means all the elk are going to concentrate on the remaining 20% of vegetation in good condition.
The draught may cause the elk to be more clusted up or on a smaller segment of land. This CAN be an advantage to the hunter.