How far is Mystic Lake Casino Hotel from Minneapolis St Paul?.Mystic Lake Casino Hotel typically costs $109 per night, which is $141 cheaper than the Prior Lake average. On average, you can expect to pay $250 per night in Prior Lake. Mystic Lake Casino Hotel is typically below the average price of 3 star hotels in Prior Lake. How does Mystic Lake Casino Hotel compare to other 3 star hotels in Prior Lake?.