That's generally the same method I use. I will feed my best eaters last, and if some snakes refuse along the way I'll feed a good eater two smaller items rather than their normal prey size. If everyone eats beforehand, the better feeders will still be hungry the next day anyway.
I had one of my BPs leave a rat on the heat this summer... in a 6qt... That's a smell I won't soon forget! And that's saying something, since I used to be an EMT.