Didn't consider burying the anchors only because of the environmental damage that I would have to do to the local grasses. I suppose if I was careful about it, it could be done.
I should clarify- don't "bury" them with a shovel. Just pound the stake in so that the top is nearly ground level.  I've been able to pull up the stakes just by pulling up on the guy line 9 times out of 10.
As an aside.... do rocks really "decompose?"  I'm sure there's a correct word for the process of them breaking down.  Anybody know it? 
"Rocks into stone, Stone into sand 
Sand that slips through the hands of a man 
Now the sands will shift and the earth's gonna roll. 
The rocks and the rain will collect their toll. 
And all I'll take is what I brought 
and I may not get what I sought. 
Whether I sink or whether I fall 
that's up to the shifting sands after all 
Before fish ever walked on land, 
time was turning rocks into sand."
Bill Kirchen