6. I don't really like losing connection to the internet, or my main computer. This isn't a sufficient condition for some of the possible trips, but not all.

A smart phone, netbook, or tablet are all lightweight ways to maintain the Internet connection as much as possible (i.e. always, except for when the plane is in the air). Personally, I found myself much more willing to travel after purchasing a smart phone ~1.5 years ago.