Some people never leave home without American Express. I prefer to always carry Netgear Wireless Hub products with me and cash for everything else.
If you've wondered about Ethernet over power, here is the current set up I have and how I got it.
I've got an Internet connection in the cottage. I have this beach and a really nice shade tree with my name on it.
Enter a construction type extension cord. I run this from an outside plug along side the property fence line right to the beach. Plug in the Netgear equipment and, presto, keyboards on the beach.
The cord is probably 500 feet along the property line I suspect passing boats can get a bit of an Internet fix.