Originally Posted by
bryanwallace
thanks
is it best to have a car to go round?
Not for the city area (Manama). The entire country is less than 300 sq mi ! Possibly if you wanted to go to see the
Tree of Life.
Originally Posted by
bryanwallace
also presume chances of a daytrip to saudi almost nil?
Less than almost nil

KSA doesn't issue tourist visas, so unless you know someone who could invite/sponsor, you're out of luck.
The causeway is impressive from an engineering perspective, but the other end (Dammam, Khobar, etc) is pretty unremarkable.
You'll find plenty of Saudis to talk to in the bars in Bahrain