Translation of obligate in Spanish

At the end of October my family will be taking a short vacation to Biron Bay north of Sidney. My wife wants to visit the coast. There are many good restaurants near Brion Bay with fresh seafood.
We stayed in this place for quite a while as it was the most spectacular place we have visited so far. It was unbelievable how much thought was put into construction of these magnificent sites.
We arrived at the airport two hours prior to our flight with no seat guaranteed. As these are local flights, the counters open just 1 hour before take-off. The alternative root would be by bus.