Assign task and let the member do their assignment at their leisure. If not done then no hunting until done. A lot of guys had rather pay the fine than do the work. Then the work doesn't get done. The fine is usually cheaper than the expenses associated with the work day.

OR.. Group the things needing done and take a volunteer or assign a committee head for the area. Then put members in the committees. If the work is not completed the whole committee will not be allowed to hunt until done.