My father and step-mother are pretty much paying for a LARGE portion of our wedding, my mother is also helping with what she can. From what I understand my parents should be mentioned on the invitation but we're not into the whole super formal side of weddings. To best describe our wedding vibe, it would be "casual elegance" with a hint of rustic, this is no black tie affair. We're not looking to spell out every date & time number, etc. I don't want anyone to feel left out but I also think I should acknowledge my parents, especially my dad for what he's contributing, but how do I go about including my mother and step-mother? Or do I just leave it with my father and mother only? Or "the parents of..." We do have a wedding website, could I do something on there to acknowledge all of the parents who contributed to our wedding in some form or fashion? I will be doing some fun signage at the venue, on there maybe? Please help...