Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is La Fortuna (73% of total searches to Arenal Volcano National Park). The next most popular destinations are Monteverde (24%) and Arenal (2%). Searches for hotels in Santa Elena (1%) are also popular.
KAYAK users have found double rooms in Arenal Volcano National Park for as cheap as C$ 17 (La Fortuna) in the last 3 days. The average price is C$ 401.