Al, six days should have you in good shape.
Larry, I had a chance to talk to my dad tonight and got some education. Here's the gist of it:
Recycled concrete like Al described (crushed concrete with everything from 3/4" chunks down to powder) would make a great driveway. You'd need to moisten is as it's placed, and compact it with a vibratory roller, if possible. He said that weeds would eventually be able to grow, but a good herbicide should keep things under control.
If you have a concrete batch plant nearby, another option that he's seen work real well is the material that gets washed out of the mixer trucks when they return to the yard. He called it "washout". With this stuff, the cement in the mix has not fully hydrated (hardened), so when it gets placed and compacted it sets up almost like concrete.
Either of these materials can also be helped by mixing in a bit of Portland cement before it's moistened and placed. He called it "Texas Two-Sack". Mix about two sacks of cement per cubic yard, and you'll have something the weeds will run and hide from. He says Texas Two-Sack can be done with just about any material (dirt, gravel, sand) and mixed with whatever equipment is available (loader, dozer, grader).
I also mentioned that you had a problem with the mud swallowing your gravel, and he said either of these materials would likely bridge the mud better than regular gravel, although it'd need to be more than a few inches thick. He said another trick to keep things from sinking into the mud is to use
geogrid, a plastic grid that's typically used under base course in roadways. The two brands he recommended are Tensar and Miragrid. He said geogrid isn't cheap, but it's less expensive than replacing your gravel every year.
I hope this helps -