I am going to be taking a long road trip with the family. And the wife and i would love to not hear 'are we there yet' for the entire trip if possible. I do not have a cellphone plan that allows hotspot sharing. so i wonder if it would be possible to setup a wired/wireless router, a laptop running itunes with an external drive full of my itunes movies with just local access? I have an inverter capable of powering a laptop and a router. So I wanted to setup iTunes with the eternal drive under one of the front seats. and use our iOS device to stream via homesharing. is this possible with just a local network?