Hi Shawn, when I went out west to call coyotes and whack PrairieDogs from long distances, my guide charged about $200/day per person.. He had the access to the private land, and knew where the 'dog towns were, and where the coyotes were active.
If you are actually 'guiding' the hunters, not just giving access to the land... I'd charge a minimum of $150 per person per day, or give a discount for exclusive access for the four days...
Have you checked around to see what other hunting clubs charge??