If it's just cars n pickups, that's what I would do too.
Can you post pics of the finished compacted recycled asphalt? Curious how it looks compared to a regular asphalt driveway.
I have recycled concrete & other than a few funky colored "rocks" mixed in you can't tell it from road base. Apparently their magnet wasn't working or working well & I'm still finding bits of metal in there years later. Some bits of clay tiles, plastic or painted concrete in there. Strangely some round blue glass pebles show up occasionally.
I have used both recycled concrete and recycled asphalt. Concrete is very dusty and remains so for its life. The asphalt as previously stated will warm under the sun and will become a solid mass again and is cleaner..
Agree with 4570. I did this "exact" same project at my vacation home [side parking area maybe 20x30ft] and pondered the wide bunch of options mentioned here. Recycled blacktop packs well, makes a more durable long term surface and does a great job over top of some firm base. However, it will always mismatch your existing gravel. Your orig post plan is right. After clearing down to solid under surface, backfill with any cheap coarser gravel available (not over 2") and pack that down with your tractor or whatever heavier machine you can find or borrow. 30x30 is not big so this is not going to take long. Once the base is firm, rained on a couple times and repacked, I'd use crusher run 3/4" gravel which makes a very good parking area, is usually the most common material at gravel plants and should look like your main drive when done. 'Crusher run' has enough loose gravel dust in between the stones that it packs well and makes a smoother surface long-term. In my central WV source that gravel is $19/ton and $40 extra per truckload to "tailgate it" distributing it over you area. I think 12 to 15 tons is about right for your 30x30 though construction folks near you should be able to give you a better estimate. You will need a FEL on your BX or some kind of means to do smoothing and palcement of the gravel even if the delivery truck does the tailgating to spread it for you.
