Congratulations on your loper. I've shot dozens of them in the past 40 years, and I enjoy eating them. But like others have posted, you have to take care of the meat, both in the field and when it is butchered. Fat, bloodshot meat, bone material, and stomach contents all add to the strong gamey taste of antelope (and other game).
I have never heard of that lease policy that the OP described, but I guess it makes some sense that if he leases a portion of his land he can't allow free access on other portions. But it is still his land. That's just another reason I left my native Colorado 40 years ago.