Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Porto Alegre (66% of total searches to Rio Grande do Sul). The next most popular destinations are Gramado (13%) and Bento Gonçalves (13%). Searches for hotels in Canela (8%) are also popular.
KAYAK users have found double rooms in Rio Grande do Sul for as cheap as C$ 17 (Bento Gonçalves) in the last 3 days. The average price is C$ 113.