Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Wilhelmshaven (50% of total searches to Ostfriesland). The next most popular destinations are Norden (25%) and Emden (25%).
KAYAK users have found double rooms in Ostfriesland for as cheap as $52 (Norden) in the last 3 days. The average price is $213.