Take a look at the site www.ccrane.com
. Look for the super wifi repeater. Ours works great, I purchased the exterior antenna in addition to the inside antenna. I have not had to use the exterior antenna at any park, but we have been in what I call rural areas not remote areas. I have the exterior antenna ready to go on an extending 20 foot pole when I do need it.
When I First purchased the antenna, I had trouble getting it to connect. Tech support was fantastic and immediately knew the issue 5 minutes later I was connected have not had any problem since.
The only problem I have encountered is not with connecting to a wifi signal, but after connecting is a signal that has poor bandwidth. In this case you get good connectivity but little or no working speed.