The logic of this is just so right. If the HP series wasn't designed to be kid-friendly, this could be canon. There is now way JKR is going to convince me that Harry (among any number of other characters) could just walk away from the events of the past seven years and suddenly start leading a "normal" life. Any attempts at it would be utter denial on his part. As you've clearly demonstrated with this fic. Heh. There are so many layers of things going on here.
I LOVE your Kreacher. Mwahaha! I want a house elf just like him.
The "Dumbledore was gay" insertion was awesome. ::snicker::
The ending was perfect. And perhaps it was a tiny bit of meta concerning the significance of the epilogue-that-hasn't-happened-yet as well? ::grin::