Traveling is fun and all, but I get full-on separation anxiety when I leave my TiVo. I love that little guy, and I totally get guilty feelings of entertainment debt.
Luckily, there's iTiVo, a download for Macs that connects to your specific TiVo and then downloads your shows into iTunes so you can put your recorded programs onto your iPhone or iPod. You'll need to enter your TiVo's IP address and media key (both located in your TiVo menu) in iTiVo, and once you're connected, you just check off which shows you want to send to iTunes.
Guaranteed, the Real Housewives will make your cross-country plane trip far more enjoyable.