Its called a Repeater. It looks like a stand alone wifi antenna with a box. Its job is to repeat the signal and boost it. However, it may or may not work depending on how weak the signal is. Remember, those little internal Wifi recievers in laptops already have a fairly limited range because they do not have external antennas. In your case, the booster might help, but it'll be dependant on the campground's network, and how weak the signal is.
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'92 Dodge W250 "Dually" Power Wagon
'74 KIT 1106 Kamper Slide-in Truck Camper
'06 Heartland Bighorn 3400RL Fifth wheel
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