I realize this is an old topic, but I figured I would throw in my .02 worth anyway.
I am brand new to the forum (don't even have my motorhome yet, picking it up Monday). I traded in a trailer on the motorhome. In the trailer, I used a setup very similar to mclavey. I have an omni-directional antenna mounted on an 8 foot pole which I inserted into a flagpole socket on the trailer tongue. The antenna was connected to a Buffalo router running DD-WRT software in the "repeater" mode. I then connected my computer, printer, etc. to the router. I have had very good results with this setup. When I get the motorhome, I plan to mount the antenna to the roof ladder.
Everyone should keep in mind that wi-fi hot spots are not created equal. How good is their antenna? How much power are they running to broadcast the wi-fi signal? How good is the receiver they are using to receive your signal? All of these things can make a big difference in you ability to reliably connect to the internet, and none of them are under your control.
