The female prisoners of the sub-camps were directed to the north. In Palmnicken (today Yantarnyj), the Germans murdered about 3,000 women on the beach.
Given the location of Yantarnyj (54°52′N 19°56′E) and Stutthof concentration camp (54°19′N 19°09′E), not mentioning subcamps (that were far to the west than Stutthof itself) it is impossible to reach the destination on food, because one would have to cross the 130 m wide water strait next to Festung Pillau (an entry to Vistula Lagoon):
How could women Stutthof's inmates reach the Palmnicken's Massacre site?
Is it possible that there were lead by land (through Elbląg and Kaliningrad) in a 36 hr (180 km long) death march?