Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Port Moresby (95% of total searches to New Guinea). The next most popular destinations are Madang (2%) and Sorong (1%). Searches for hotels in Jayapura (1%) are also popular.
KAYAK users have found double rooms in New Guinea for as cheap as $12 (Jayapura) in the last 3 days. The average price is $86.