That depends on what the desired result is.
Since the trip is most like an ocean voyage, send submarine sailors. They're used to being isolated for long periods of time while being reasonably self-sufficient. They know how to manage their environment and deal with emergencies.
Just don't send anybody with them that isn't used to their sense of humor.
In my high school the majority of the white male teachers were coaches first, and teachers second. No-one cared how well they taught as long as the football/basketball/volleyball/wresting team was winning.
I heard that story on EscapePod http://escapepod.org/ and couldn't figure out what it had to do with SciFi, but that was true of most of the stories during their 'Hugo Month'. In fact, the hosts noted that the only reason some of those stories were on the show was because they were Hugo nominated.
I find including or excluding anybody or their work because of race/gender/orientation pretty disgusting.
Both the dog AND the cats?
I find NoScript combined with ABP works well for me. It ensures that what does get through probably won't be too annoying.
Fear leads to anger, anger leads to hate, hate leads to big giant lasers.