Have discussed with husband, but not put it down all legal like (still need to find a lawyer for the will and estate stuff, but I live where a completely handwritten will is legal so that's what we have now).
Neither one of us is really upset about dealing with morbid subjects like this, so we've talked it all out without interjecting emotions into it. We've both seen some pretty terrible things in our lives, so death and end of life planning is not scary to us. I'd rather make sure we're both crystal clear on what we wanted for our own death planning, so we figured it out years ago.
For me: No funeral, obit, gravesite, memorial or anything. Donate body to science (body farm if they are accepting, otherwise whomever will take if for no fee). Could care less what they do with the shell once I'm dead. Funerals are for the living, and since there is not one person I can think of other than the husband who would need to mourn me, I see zero point to wasting the time and money on one (no kids, no close family, no close friends in the area).
Husband is pretty much of the same mind for his own plans, but as far as the actual body disposal, he's leaning more towards cremation and scatter wherever rather than body donation.