Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Rovinj (40% of total searches to Istarska). The next most popular destinations are Pula (30%) and Rabac (20%). Searches for hotels in Poreč (10%) are also popular.
KAYAK users have found double rooms in Istarska for as cheap as $97 (Poreč) in the last 3 days. The average price is $336.