The problem with point-to-point is the trees that are in the way (I think). Also this all seems a little complicated. I'm just looking for a method that will let me take my laptop to my cabin, plug it in, and be online. You know?

edit: here's an example of what I'm looking for. Say I'm in an RV park, and I want to get WiFi from the Starbucks that's 600 feet away, but there are some trees between us, what would I need to buy? I don't want to run a cable or anything like that.