I don't know, I've always viewed the word quite negatively. Mainly because I rarely hear it used to describe something good. Mostly? I hear it used to describe stuff like Batman & Robin.
See, there's a huge difference between camp and crap. Here, I'll let wiki do the heavy lifting.
http://en.wikipedia.org/wiki/Camp_(style)
It's something that's exaggerated to the point of near ridiculousness. I'd say a big game hunter, Nefertiti, bumbling robots running around with dinosaurs that act like dogs firmly falls into that category.
Again, it's not BAD, it's campy.
Camp becomes bad when it's taken to an extreme to where it is beyond ridiculous, such as Batman and Robin. The original Batman TV series, that was FULL ON camp, but it was great because it was so ridiculous it wrapped back around to being fun.
The Hitchhiker's Guide and most "zany" stuff falls into the same category. It doesn't mean it's bad.
Just as a caveat, one of the reasons camp has taken on such a negative connotation is it's association with homosexuality and it's aesthetic being embraced by that community. This leads to one of the main reasons it is used as a derisive term.