Thanks for all the input, folks. We're going to use a combination of the counsel you've given, with the time and "hands" we have available:
1) burn (as best as possible, as its all green)
2)fence the whole area (to keep our dogs out who think every time we dig for any reason, we're doing it just for them

),
3) till semi-shallow to tear up the vegetation - probably only 1/2 the area to begin with
4) rake out, add manure from our neighbor's place, then water
5) till again (deeper) in a couple of weeks
6) do it again, water
7) get some of my stuff tranplanted if its not murderously hot by then
8) mulch like crazy
The scraping isn't going to work (rats) as we can't get the old stumps out that we have been trying to burn out.
What'cha think? I'll be back to tell you if this works. Thanks again.