We're celebrating our Passover seder at my parents' house this weekend. First time we haven't hosted it ourselves in several years.
Of course, ours is a "lite" version. An Orthodox seder typically runs about 12 hours over two evenings. Ours runs about 90 minutes over one evening. Two hours if my slow-eating sister-in-law is with us.
We also use a highly abridged version of the
Haggadah. It's a "Humanist Haggadah" that removes most references to God, and instead focuses on history, society, and tells the Biblical narratives as metaphorical stories rather than actual events.
And the food? Damn awesome.
As far as wishing Jews a "Happy Passover," it's really not necessary. Jews may wish each other "Pesach Sameach" ("PAY-sock sah-MEY-akh"), but do not typically expect any such greeting from gentiles. I suppose it wouldn't be out of order if you are a guest at someone's Seder.