Of course there are trade-offs to being introverted: No backpacking trip, but also no needing to be around people you don't care about.
You can also say that the preference of introversion is inconvenient - the fact that you don't like hanging out with these semi-arbitrary people "prevents" you from having fun. To take that to the extreme, it would be pretty convenient to always be unconditionally happy.
eh. Been backpacking plenty of times by myself (as well as with other people).
EDIT: I do understand it's just an example and there are indeed some activities that need to be done in groups and would often, in practice, be done in groupls of people you don't know or don't know well. But there are also lots of typically multi-person activities that you certainly can do by yourself.
I do lots of solo travel, partially because I'm often traveling solo on business. I find a lot of people cant conceive of heading off by themselves for a weekend or longer, especially in a foreign country.
You can also say that the preference of introversion is inconvenient - the fact that you don't like hanging out with these semi-arbitrary people "prevents" you from having fun. To take that to the extreme, it would be pretty convenient to always be unconditionally happy.