Yep, for future reference, the only surefire way to make it easy it to buy the eggs a week in advance, at least. So hop in that time machine, OP!
(My mother used to get her eggs from an egg lady in her town, so they were warm-from-the-chicken's-ass fresh. And she kept wondering why we always had to default to egg salad when she tried to make deviled eggs.)
The other tip I have (again, for future reference) is to put the yolk mixture in a pastry bag or even just a ziplock with a small corner cut off. Squeeze it in, instead of trying to spoon it in.