So we are newly engaged and planning a wedding for fall of 2011. My problem is this, many many years ago (about 20 now) my parents divorced and there was a earth shattering rift between sides of family. I am literally the only one of 5 siblings that has a good relationship with my dad. He and I are close now, but two of my siblings "hate" him and will have nothing to do with him, as well as awkwardness between the rest of the extended family that would be massive. I don't want to completely exlude my dad's side of the family but have no idea how to approach this with any sort of tact or ease. I know he/they would try to be understanding but would still be hurt. I was thinking of inviting them to an engagement party or letting them throw some sort of party/shower closer to the wedding next year. Any ideas or helpful advice?