As Anna journeys out in the mountains searching for Elsa, she finds the trading post and goes inside to buy some comfortable winter clothing. Inside, Kristoff enters and the two eventually meet. The seemingly happy and calm Oaken is angered at Kristoff after he calls him a "crook," and kicks Kristoff out of the store before returning to his usual self. Anna then gets the idea to have him guide her to the North Mountain in finding Elsa.
The trading post is the last place Olaf visits after gathering holiday traditions from all of the Arendellian citizens. Oaken invites Olaf to join his and his family's holiday tradition, which is relaxing in the sauna. As keepsakes, Oaken gives Olaf a sauna and his own festive waist towel.
Taking place during the events of Frozen, the evening following his coming to life, Olaf approaches Wandering Oaken's. Once he gets to the door, Anna opens it, hitting Olaf and all without noticing him. Olaf walks inside and approaches Oaken, who does not appear shocked by the sight of a living snowman. Olaf notices his lack of a nose, and asks Oaken if he has any carrots. Oaken explains that he is out of carrots, so he gives Olaf various objects to try for his nose, including a stereoscope with images of summertime. Taking notice of Olaf's fascination with summer, Oaken offers him a summer sausage for his nose.
There is a plush Mickey Mouse on one of the shelves in Wandering Oaken's Trading Post and Sauna.
It's unknown as to how Anna paid for the items she bought, since it's unlikely that she had carried money with her. However, it's possible that she sold off her green dress to pay for the items she bought, which is supported by the fact that her ballroom dress hasn't been seen since. She may also have sold her greenish-gold pendant that has the Arendelle's symbol, which is expensive because it's a jewelry worn by a princess. Another possibility is that she promised that she would pay for everything, supported by the fact that she likely didn't bring any money to pay for even the winter gear. Or, she could have told him she was the Arendelle princess and convinced Oaken that Elsa would reimburse him later, and barring that, it's entirely possible Anna did suggest Oaken send a messenger down to Arendelle to collect money.
There are carved trolls on the front porch, like the ones in the film.
The shop has a smaller counterpart named "Oaken's Cloakens" in the Arendelle village. The smaller shop appeared in Frozen Fever.
"Wandering Oaken's" is an anagram for "naked Norwegians". This is referenced perfectly by the fact that the shop also includes a sauna, in which people sit and wear nothing but a towel around their body; therefore, it makes them the "naked Norwegians".