The store is open Saturdays but the cafe is closed for the season and food service will start up again in April. The Lowman Inn (half mile from Haven) has great live music, pizza, finger steaks and wings and Sourdough's (8 miles) restaurant is also open for breakfast, lunch and dinner.
I think they are only open Thursday through Sunday. I suggest calling them to confirm. The owners are nice and I think you will enjoy your stay.
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