What is the process of getting an easement on a parcel of land in state of Mississippi

I have been given some land, but I have to cross a creek to get to it. There is no bridge or road going to it, but their is an alternative route. There is another entrance on my side of the creek, but it is for sale by a timber company right now. We called the company to ask if they would give us a right away and they said they couldn't because it was for sale right now. It would be so much easier for me to come through this way rather than building a bridge and road on the other side. Can you give me some advice on what I can do? Thank You.