Hmmmm, I kind of like the idea of doling out fat throughout the day in 50 calorie increments. Just go, and if hunger starts bothering me too much, then have a small bit of something. And if not, then I can pass.
I did a 24 hour water fast last month and it went very smoothly, easy peasey. So yes, I think I'll follow your advice to start the first portion without supplementing non-insulin spiking calories. : )