I have to assume your 3/8 crushed and 3/4" crushed stone options are uniform size and dont contain fines. (your 1" minus would have fines and pack well).
the stuff with fines and packs well is typically a "dusty" surface and tracks in on your boots. But packs in and once rained on a few times becomes like concrete.
The 3/4" and 3/8" stuff is not a compacting gravel, and is ever moving/loose. Nice for re-grading and maintaining, but sucks for plowing.
Based off the single pic, the drive dont look bad at all. If it was mine, I'd spray to kill the green stuff, give it a few weeks, then top dress the drive. Either LIGHTLY with the box blade/rippers, or with a landscape rake. If at that point, you so desire a top coat, Then top coat it with a THIN layer of whatever you choose.
I'd forgo the landscape timbers. Almost like they arent treated lumber, as they are usually rotten to nothing in just a few years. And really look like crap after a year or two.