That is primarily a 5 GHz device. The 2.4 radio does not have power amplifiers or use the dish antenna and will have very limited range. So it is only of much use if the campground offers a 5 GHz signal.
If you do have 5 GHz service the most useful configuration would be what is known as a routed client.
Presumably the campgrounds will only have 2 GHz so there aren't as many options. Look at the Nanostation loco M2 or the UAP-AC-Mesh. The latter is true dual band and GbE, both features that are good for the future, but it isn't directional. If you have a weak but usable signal on a handheld device the AC-Mesh will get good reception.