TexasCHLforum.com

If I was defending against municipality enforcement, I'd want to show that I own a 10 acre tract properly platted on tax records. I think this would be indisputable.
As you're not going to have that, leasing or showing an agreement might meet the requirement, but I'd want to have something in-hand that is formal.

That being said, I'd not worry about meeting those requirements out of the gate. I'd worry about talking to my neighbors and heading off any possible calls related to firearm activities. If the neighbors are good with the activity, you never have to defend anything... Likely if the PD is called there are other ways to enforce unwanted activities.