Better Wi Fi capture in campgrounds

I use a wifi range extender (wifi booster - they are called various names) from Amped Wireless. There has to be at least a weak connection to the wifi to start with. Mine needs a laptop or PC to use as a display for the device to be able to lock in the wifi signal. Since I got mine, I believe some of these don't need that. What happens is the device connects to the laptop. It then finds the signal and locks it into its memory. When you then connect with your tablet or laptop to use the wifi you are going to select the device as your wifi connection and not the campground's wifi. The unit has the campground's wifi locked in and is boosting it. I have gone from a poor wifi connection to a solid connection that does not drop. It is not increasing bandwidth. If there is a problem with too many users in the campground on the wifi at the same time it will not do much for that. But I no longer have to go outside to the office or the nearest wifi point to get a usable connection. As long as you stay in that campground - even after you turn off and unplug the booster - once you turn the booster back on the signal is still locked in to connect to. Change campgrounds and you need to do this all over again. This may or may not be what you are looking for but it has worked for me. It cost about $100 in a computer discount retailer.