Is there some reason you all want a wide expanse of dirt type driveway?
I like the two tire tracks style, when the tracks start rutting, just fill with 3/4" to 1" pebbles. The tires keep the weeds down, and center can be bush hogged. Parking areas can just be grassy, or if used a lot or under heavy load, the free draining honeycombed paver materials can be used.
Dilute Chlorox will keep weeds down in areas with pavers, and isn't toxic like some of the other materials suggested (used oil? Ya gotta be kidding-- there is one house not far from me that is a brownsite due to the owner having a small engine repair place for 30yr, and dumping oil in the back. Dumping old oil on a driveway is just a slower form of getting to the same heavy metal contaminated state and imploding the value of the property).
Have to try the vinegar, there are some possible advantages of the acetic acid over sodium hypochlorite.
While there is a place for 'better living through chemicals', too many people believe the Madison Avenue line-- way too many toxic chemicals are used when perfectly good alternatives exist, including the alternative of doing nothing. Sometimes those toxic chemicals cause secondary problems, just like prescription drug side effects, then you need more chemicals for the side effects, and start a downward spiral (till all the amphibians are dead and you wonder why your kids are sick all the time).