I make my ridgeline as long as (well, nearly so) the hammock & slowly adjust down, ie add more sag, slowly. One of my hiking partners is about the same size as I am, our hammock sag preference is VERY different, so I suggest starting with a bit tighter sag than you think, & allow it to be adjusted by daughter to fit HER. I think there is a post about an adjustable ridge line here on HF somewhere.
I can nap in Robs hammock, but no longer than about 1/2 hour, he feels the same about the sag in my hammocks.
When you have a backpack on, no matter where you are, you’re home.
PAIN is INEVITABLE. MISERY is OPTIONAL.