Avoid drama by staying out of the drama. Inevitabliy at the next family gathering there will be some conflict. The best way to free yourself from repeated patterns of conflict and stress is to stay out of it in the first place. You do not have to comment or offer opinion on everything. It is not your job to be the agitator or peace maker. Half of the issues about which you feel resentment, nobody else may even remember. So, it is not necessarily the time to address all the old family wounds and secrets. Work on healing your own wounds, be present with loved ones and act with love.
Have a blessed day. Peace