Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Gramado (81% of total searches to Serra Gaucha). The next most popular destinations are Canela (8%) and Bento Gonçalves (7%). Searches for hotels in Caxias do Sul (4%) are also popular.
KAYAK users have found double rooms in Serra Gaucha for as cheap as $11 (Nova Petrópolis) in the last 3 days. The average price is $74.