Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Auckland (72% of total searches to North Island). The next most popular destinations are Wellington (13%) and Rotorua (10%). Searches for hotels in Taupo (5%) are also popular.
KAYAK users have found double rooms in North Island for as cheap as $12 (Auckland) in the last 3 days. The average price is $146.