Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Angra dos Reis (50% of total searches to Ilha Grande). The next most popular destinations are Vila do Abraao (25%) and Praia de Aracatiba (25%).
KAYAK users have found double rooms in Ilha Grande for as cheap as €9 (Angra dos Reis) in the last 3 days. The average price is €111.