Both of my parents went quickly, and were still sharp of mind...my father at 84, mother 95. Both were "ready to go", neither had any desire to hang on for the sake of hanging on. We didn't have a funeral per se for my mother, just a final Thanksgiving at the family home. It was just my sisters, niece and I with our respective significant others. There were a few scattered cousins, etc. but most anyone who'd be apt to attend a funeral had predeceased her.
Both my wife have made it known to each other and to her sons how we wish our ashes be dealt with. Who knows if they'll honor those wishes, and given that we'll be dead won't really matter I suppose.