Backyard burial is illegal where I live too, but I know many people do it anyway.
When my Collie passed, many years ago, my vet took care of her. I had to have her put down. ( I didn't want to know what they did, I was beside myself in grief - I'm suspecting it's what Linda mentioned).
When it's time for the guys I have now... well I intend to have them cremated and do what Jodi has planned. I hope I don't have to think about that for many years.
It's just so sad, and such a deep loss... but I suppose it's something that needs to be taken into consideration.

to everyone who has had to go through the pain of loss.