It is a young and growing industry, but "techno tourism" does exist. I found this site Travel2Dance for a company based in the Netherlands, that sells packages for European festivals.
Below is the info, I was able to translate thanks to BabelFsih:
Stands for optimum service, expertise and reliability. From January 2008 our office has established in rising districts. Gladly you offer the possibility we in advance a look of taking part in of our partytrips. Travel2Dance uses of many years' knowledge and experience in travel and works with several dance organizations and tour operators.
We offer partytrips within the Netherlands, Germany and Belgium. In the future travels will be extended to more countries. The team of Travel2Dance gives with all pleasure expert recommendation and information you.
With a party sniffing by means of Travel2Dance, you choose for an unforgettable experience, to which destination you go also. Such as Armin Only, Reverze, Loveparade, Defqon1, I love techno, Bassleader, Nature One, Reverze, trance Energy, Sensation White & Black or Timewarp! For all your questions and information, you get help always at our.
Travel2Dance has established at rising districts. By e-mail we are by means of firstname.lastname@example.org and telephonically of Monday reach till Thursday from 09:30 up to 17:30 by means of +31 (0) 70-3076777.