Dommer will be able to give you much more detailed information, but I can certainly try and help.
Basically, you arrive into Oslo and catch a bus into one of the suburbs. When you get there you will see around 30+ pitches along both sides of the road, with Umbro and Norway cup adverts accross the place.
The referees' stay at a school, wich is a building designated wholy to the referees' and referees' department. We stay in a classroom, wich you can fit around 15 into, ond beds, that have been provided (you need a sleeping bag though). Although its not 5 star hotel, its ideal if you are a newcomer, and came on your own knowing nobody, as you know you are in the safe hands of other referees' and sleeping in these classrooms helps you make news friends, settle in and generally have a good time.
If mixing with new people is not what you are after and you wanted to stay as a group, then thats fine too. Correct me if I'm wrong Rocky but I think thats what the Wolverhampton RA do?
As far as arrangements go, you have brekfast and lucnh in the referees' school, and dinner is at a massive sports hall. This is very nice, because you get to mix with the players, and wittness in full the vast amount of people there!
You can check your fixtures for the following day on the internet using your number, or on the wall in the referees' hall. In the morning, you collect your match cards to note down goals etc, and this confirms your fixtures. These cards are taken away from you by a small child on a bike straight after the match, so its always a good idea to have sweets for them
.
Some games are on the main site, others around Oslo, so its important to note weather you need to catch the referees' shuttle bus.
As far as transport goes, you can have all public transport in Oslo free with your Norway cup band, that also enables you to have your site meals.
The quality of football is great, honestly, more or less every team is of very high quality footballers. Most games are 11 v 11, and tend to last around the 30mins, there are also 7 v 7 matches. All the facilities you could possibly need are there for you, specificaly for referees'. The referee department are very helpfull. Its a make your own way to Oslo kind of thing, but most people pre-arrange flights so that they are not on their own.
More info can be found on their website.
http://www.norwaycup.no/ or by asking Dommer OFK.