This has probably been done before so I'm keen to tap the mountains of knowledge in HF.
I'm thinking loop from hammock whipping tied in prusik (or similar) around single suspension line up to marlin spike.
To me this sounds as simple as whoopie slings but lighter as the line doesn't have to go out and back?
If slipping is a problem maybe a slippery half hitch behind the prusik once adjusted.
Thank you in advance hammock gurus.