Apartments and holiday homes
If you stay for a week or longer an apartment might be a good alternative to an hotel room. The supermarket in Wengen allows you to get your groceries and cook your own meals. Apart from that there are plenty of restaurants in Wengen, although some of them might be closed in low season.
The landlord or rental company will provide a free Visitor's Card upon arrival. The card provides various discounts on local attractions. Note that if you own a rail pass, you will get a better discount on many attractions.
The e-domizil website offers many apartments and holiday homes. The best price is guaranteed.