We use an Asus RT-AC66U that allows us to have both wired and wireless (WiFi) connections in the trailer, and is not dependent on having an external WAN connection. I installed two 8-port managed switches that give us a bunch of wired connections (Gigabit Ethernet) which run things like a Roku, Apple TV, and a TVIX box and media server. The wireless side is used by phones and laptops.
We have both DSL and DOCSIS 3 cable modems that can be hooked up for WAN (Internet), and it will also hook up to a cellular phone or mobile hotspot via USB.
