I can't answer all the questions but I recently took golf clubs to Malaga. I was in CE but there was no issue with the clubs being my second bag so I can't see any reason why it couldn't be part of your silver allowance. They must comply with the weight limit (32kg) which shouldn't be an issue. Mine were in a hard case but this is because I once witnessed someone's clubs which were in the golf bag with a cover over the top, being collected in Turkey and the driver had snapped! He didn't look impressed!