Having just watched the movie for the very first time, you can tell how much the designers of Darkmoor and Unchained are fans of Van Helsing 2004, and I mean that positively. As much as I do wish Unchained was a bit scarier, I can love and appreciate its campy aspects a lot more now.
That isn't to say the land and ride isn't horror at all and campy-action like the movie. I'd say a good way to describe it as a whole is Van Helsing 2004 if it was a bit less campy and took itself about 75% more seriously.