Good luck to you. Wish I could help, but the only thing I know is trespass fees are what they are and some ranchers think they are worth gold...cant blame them because some people pay through the roof for them. If you have plenty of time maybe you could spend a couple days looking over the public land. There is not a lot but C is a big region and you could get lucky, just by walking a 1/2 mile off the road will get you away from the majority of hunters.
For sure go ahead and call the list, this late there may not be any openings or very few.