22 Chuck gave good advice in calling the local DRN office, as they might be able to put you in contact with local ranchers wanting prairie dog shooters.
The problem might be finding enough suitable dog towns to keep 10 guys busy and camping locations near the dog town might also present a problem. In some areas you won't be able to get back into some of these dog towns in a motorhome and will need a vehicle with adequate ground clearance such as a pickup.
Might also consider SW North Dakota - around the Marmarth, ND area.
Once in your chosen area, stop in at a co-op/convenience store and ask around. In small towns just about everyone knows everybody in the area and they will give you good leads as who to contact.
I've shot various dog towns in the Mararth, ND area and back then the people were mighty friendly and helpful. I think the only café is now closed - if my daughter & SIL make a trip this summer out here, we will be heading that way for 3/4 days but shooting all day for 3 people can usually be done finding 2 dog towns.
The other thing I do is purchase 4 to 6 pound boxes of chocolate turtles as gifts to the ranchers who allow us on their property. I find chocolate goes over much better with the woman of the house and kids versus a jug of booze for the guy. Years back, when I found a rancher with good land to hunt mule deer and antelope on - this was in Wyoming, I would send a nice box of Figi's at Christmas time. Just a little thank you and consideration usually goes a long way in developing a hunting friendship with some landowners.