It pains me to see hunting headed down that road. It’s bad news. I hope you can beat the “system” as it is. Good luck.
Here in Montana, we have a leash law that states that dogs must be leashed or contained so they cannot run at large. If people catch dogs running deer here, it’s open season on the dogs. And I know people that have shot dogs that were running at large. I wouldn’t get along down south very well, I don’t think. Anyway, I would suggest at least a 4-5′ fence if you do go to fencing your property. I build fences for a living, and deer can clear 5′ fence fairly easily if they know it’s there. Depending what kind of dogs are used, perhaps you won’t get fence jumpers. Good luck as well.