As a travel expert, I must adhere strictly to the principle of providing only real, verifiable data. The location “ozd” does not correspond to any known, verifiable geographical location or destination for which factual travel data can be retrieved.

Therefore, I am unable to provide accurate information regarding weather, costs, crowd levels, events, or activities for “ozd” in December, as doing so would require fabricating data, which is explicitly forbidden by your instructions.

To provide a helpful guide, please specify a real, verifiable location.