Before spending any money, you had better check and re-check with the park as to what "wired" internet is going to mean. I have never seen a park with Ethernet wiring run to each site. It would be an expensive and very impractical solution to internet access. Even after running all the wires, there would be no outside connection on a normal RV to hook up to. Therefore everyone would be running wires through their windows. Plus, who carries long Ethernet cords with them to hook up to the connection anyway. Finally, many portable devices don't have Ethernet ports, so they would be useless.
My guess is the park is small and they have a couple of wired ports you can plug into located in a common area such as the laundry or office. I would further suspect the park is either too small or too cheap to invest in even a basic wireless system and only have those connection ports so they can "SAY" they have internet access available. I would also suspect that the internet connection is dial up slow, since they obviously don't intend to have a lot of people use it. I wouldn't place any hope on a wireless router or any other potential solution turning what the heck ever that park has into a decent internet experience.
