[dmkirwan]

I was going to respond saying that you should be strict about declining meeting outside of working hours and protect your time, but then I remembered that my company is not every company and this may not be supported or possible. It does sound like you are overworked and the company may be poorly managed in this regard.

I think your best options are to speak with your manager about it or start looking for other jobs with better work-life-balance. The companies you are looking for certainly do exist!