We got a wifi booster for just this same reason. There needs to be some signal that can be boosted. If you get no bars on your laptop or tablet, this is not going to create a signal out of nothing. The one that we got needs a laptop to make the initial connection at each campground. The booster connects to the laptop to use the laptop screen as a display to set up the connection. I don't know if a booster exists that will use a tablet to do this. The signal is found, shown on the laptop screen, any passwords, etc are entered to make the connection, and once the connection is locked in, the laptop is disconnected from the booster(network cable is used), and the booster retains the connection even when shut off. You then turn on the booster and connect by wifi to any wifi device that you have. When we go to another campground, we have to do the same thing all over - even going back to that same campground if another connection was locked in since we were there.
It has worked and we have been able to get use out of weak wifi signals. We have one the Amped Wireless units - the one with the longest range. Look for one that talks about connections outside of a house. One that is made to go from the first floor to the second floor in a house is not going to work for this type of application.
