At common law, the mineral interest owner has the absolute right to make reasonable use of your surface, without compensation, to extract the underlying minerals. This would include exploratory operations. Wyoming has modified this rule by enacting the Suface Owner Accommodation Act. Your rights against the mineral owner (including the lessee) are governed by the act. I suggest you review it as it is fairly short. I have posted a link to it below. Check out 30-5-401 through 30-5-410.
In summary, you are entitled to notice, not compensation, for non-surface-disturbing activities. For surface disturbing activities, the operator has a duty to attempt to enter into a surface use agreement with you and pay for actual damages. You cannot prevent development by failing to agree upon the appropriate amount. If you disagree with the amount offered, the operator will post a bond and you will have to petition a court to determine your actual damages. In addition, the operator must reasonably accommodate existing surface uses. The operator can never be barred from extracting the underlying minerals. Instead, the operator need only make a reasonable attempt to accommodate you. If your current use is inconsistent with oil and gas development, the current use will give way.
http://michie.lexisnexis.com/wyoming/lpext.dll?f=templates&fn=main-h.htm
Hope this helps.
Adam