I have a Roku at home and I love it. I think for traveling, you need to. Ring your media with you. That may mean DVDs, or an iPod touch (or similar) that you connect to your tv.
Even though you could use a mifi to avoid hogging the CG wifi, there are a lot of variables to contend with. You may not have adequate signal. As much as my work is online and relies on Internet connectivity, I have to keep reminding myself that high speed Internet access is not ubiquitous. I'm not parking my camper at Starbucks after all.
Case in point: I have an iPhone and I use Pandora to listen to music wherever I go. So much so that I used to not have any music on my phone at all. So there I am, driving through Virginia on I-81, and the music stops, because there was insufficient bandwidth available to stream music.
2008 Rockwood 8315SS