Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Hilo (83% of total searches to Hawaii Volcano National Park). The next most popular destinations are Hawaiian Beaches (12%) and Keaau (2%). Searches for hotels in Pahoa (2%) are also popular.
KAYAK users have found double rooms in Hawaii Volcano National Park for as cheap as $102 (Mountain View) in the last 3 days. The average price is $158.