In reply to summo:
> I would recommend a day South down at kullen
I'd respectfully disagree with this, on the basis that the routes at Kullaberg are generally less solid than the ones at Gogarth South Stack and frequently make Stanage ones look towering - I lived an hour from there for two years and, while there
are routes that are worthwhile, they're certainly not of interest to an international visitor, particularly as compared to Bohus. If, however, you're driving up to Gothenburg through Germany and Denmark, and so find yourself driving up the E6, it might just be worth calling in as it is, to be fair, a beautiful spot. The guidebook is Swedish-only and can be picked up at outdoor shops (Naturkompaniet is the main one) in Malmö, Lund, and Helsingborg, although there is an online topo:
http://www.sverigeforaren.se/listing/kullaberg/
There are several crags that are accessible from Gothenburg city centre, with a good mix of trad and sport (and some mixed routes), but Bohuslän is an hour north and far, far better - easily as good as the Peak in terms of quantity and quality of single-pitch crags. Some of the best are
Häller,
Hallinden,
Galgeberget, and wonderful routes include
Prismaster (n6-),
Bergkirstis polska (n6-), and
Tor line (n7). The guidebook can be picked up at the Tempo supermarket in Brodalen, which is right in the middle of Bohuslän (if I remember right you can see Häller, one of the main crags, from its car park), and the local club hut (run by Bohusläns Klätterklubb) is located here:
https://www.google.co.uk/maps/place/58%C2%B029'51.7%22N+11%C2%B028...
It's possible to camp in the garden or pay more to sleep in the hut (obviously dependent on how busy it is), and there's pretty much always room to camp, even on Swedish bank holidays. Anyone and everyone there will be extremely willing to provide crag/route advice, and it's very sociable and friendly.
It's probably worth mentioning that Bohuslän doesn't have much for people operating below 6- (roughly HVS/E1), and if you're not good at jamming you'll have a hard time - and/or adapt quickly. More importantly, it should be noted that getting hold of beer/alcohol in Sweden can be tricky - Systembolaget is the one shop that sells it, and is only open 9-5, Monday-Saturday. If I remember correctly, the nearest branch is half an hour from the BKK hut, so if you like a nice beer after a day's climbing be sure to plan ahead!
If you need any other information, feel free to email me.