I have been hanging in my unfinished basement by the floor joists. As you know, hanging from that height, I have to have my attachment point quite a distance apart. How about a hybrid TurltleLady set-up. Suspend a conduit/fence rail strait down from joists, then attach hammock to rail? No more straps across most of the room.
Should work ... eye bolts in the joists, plus eye bolts in the ridge pole, some kind of suspension in between.
Not sure how it'd be any different than hanging from the joists themselves, though. Is it not the same thing?