How much of the minerals does he own? How many acres are impacted? I would be hesitant to sign away my surface rights in most situations without explicit terms guaranteeing specific acreage and locations allocated for current and future wells. I would reach out to the operator of the gas wells - contact their land and/or legal dept and talk about it. Because they are being approached for the same issue. And they have a much better idea about future development than most or all mineral owners do.
I have an oil and gas lease in Texas with solar on surface, but all horizontal wells (rendering the solar issue almost a moot point). In Kansas you won’t have horizontals most likely so surface access to get to the minerals is very important. Agreeing to specific locations and acreage for future development is necessary in my opinion. Anxious to hear what your gas well operator has to say.