Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Füssen (40% of total searches to Allgäu). The next most popular destinations are Lindau (40%) and Oberstdorf (20%).
KAYAK users have found double rooms in Allgäu for as cheap as $66 (Oberstdorf) in the last 3 days. The average price is $374.