Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Medan (50% of total searches to Sumatra). The next most popular destinations are Padang (17%) and Tanjung Sepat (17%). Searches for hotels in Bukittinggi (16%) are also popular.
KAYAK users have found double rooms in Sumatra for as cheap as RM 32 (Pekanbaru) in the last 3 days. The average price is RM 154.