I saw you are selling an Iridium Go, if you get multiple offers let me know (or have them message me), I have the same items to sell as well, and I'll match your price+shipping
If you're planning on living aboard during that period then I suggest you stay within a short distance from Stavanger as the connubation 'falls off' quickly and you'll find yourself out in the middle of nowhere. Contact either:
Flemming Henriksen at LundeBat (the dealer for Bavaria in the area) located on Hundvag on a 'bridge connected' island which is the other side of the channel from Stavanger, or contact Benjamin Opdamn at West Coast Sailing - alternatively, you can contact Stavanger County Council who have a municiple harbour in the center of Stavanger and I know you can arrange "over winter" rates: be sure to contact "Tollvesen" to inform them of your plans as they'd normally impound your boat after 90days and want you to pay 25% VAT as import tax unless you arrange beforehand.
If you're not planning on staying on the boat I recommend Rennesoy Marina - it's 30 minutesout of stavanger, is a lower cost marina which protects from the winter storms (in the lea of the island)