My advice would be to leave him behind and have a great time with your kids on your own.
Velvet wrote a very good thread about Christmas and how to cope with it, I think this could be applied to ‘special occasions’ too. http://www.gamblingtherapy.org/en/christmas-2013-thoughts
She says “By looking after yourself you will give all your loved ones a happier Christmas than if you allow the addiction of your loved one to bring you down.”
Good Luck Madge, we look forward to an update when you get back. Keep smiling. San x