Here´s a link for a wery close Hostel. Prices ca 200 - 250 SEK/night (£15 -20)
http://www.hostel-gothenburg.com/ (just an example) there are more but there websites are not in English, just ask if you want anything els.
Three star hotel wery close:
http://www.svenska-hotell.se/goteborg/h ... destinatio n_id=3&h_id=1226 (English version)
On the map you see the greenpark down to the right Thats "Slottsskogen" where the Festival is.
about £ 60/ night doubble room.
More to come...

