I have a shadow rock gravel along my house and in back yard areas (see photo with trellises). It’s about 1-2” in size, not tiny, not large.

I am wanting to put it in the strip between my and my neighbor’s driveways, but ther’s a drop of about 11” across that ~ 6’ wide strip. Is there a way to make this work that’s somewhat affordable - not requiring those geocell stabilizers or a retaining wall of sorts? Would just excavating some soil to smooth out the slope be enough and create a basin on the right side be enough, you think?