I think the information the park employee got from someone else was regarding repeaters, not a signal booster. A repeater does exactly that, repeat the signal. They are designed to be placed between an access point and the user when the distances are too great for the user's signal to reach the access point. Some people use repeaters in their RVs and if their devices wifi signal is strong enough to reach the access point, the access points traffic has doubled since it "sees" the signal from the device and the signal from the repeater. Also, repeaters repeat all the signals they receive so even if the device user was directly next to the access point and the repeater 500 feet away, the repeater will still send the repeated signal from the device even though there is no need. In most RV park situations, repeaters are generally not a good idea, it is much better to have multiple access points, each with their own ssid. People who have their own repeaters in their rigs do degrade the service for others.
