If you take the sea route north you have several options. The various routes have been dealt with in history, and through the Middle Ages the traffic increased as well as the trading with Nordland in fish and herring, feather and down. One of the central routes passes through Kjelstraumen, in the sound between Ulvøy and Bakkøy. This has been a place for a guesthouse since 1610, with Royal Letter of Privilege, part of the large network of trading post and guesthouse locations along the coast.
Kræmmerholmen is one of the old privileged trading posts. From the 1600s all trading in West Norway took place in Bergen, and the farmers were obliged to travel into town in order to sell their produce and buy what they needed. In Bergen City Privilege of 1702 the merchants in the city were allowed to establish “Trading posts in the countryside”. The owner had to have residency in Bergen and the trading post was to be run by an assistant. In this way the city retained financial control of those living in the districts, and not least with buying and selling of fish.