I am planning a one week trip to Croatia (arriving in Rijeka) on August 17 with the goal to explore as much as possible during that one week. Therefore I am looking for suggestions for accommodation (rental or hotel) for a family of 4 (2 kids) in order to be able to see as much as possible and still being able to enjoy some beach (sandy?) fun in Croatia for the kids. I am planning to rent a car so driving is not an issue. Any suggestion on a good rental place for some 450 EUR max? Thanks in advance.