WIFI extenders on sale at Amazon

I have one of the Netgear repeaters and it does allow my tablet to stream Netflix without buffering when I plug it into the RV, something it will not do without the extender. This is with the RV parked beside the garage. It does not change the bandwidth available and in fact while signal strength goes up the speed of connection seems to be less, although still enough to avoid buffering Netflix. That is my observation.

So in a RV park it may help get the signal you are receiving from one end of the RV to the other but will not improve your connection speed.