Almost no suspension.
I did very short loops (aka soft shackles) at the hammock ends to get as much sleeping area as possible. My van's (Honda Odyssey) measurements led me to a DIY 9'-5" hammock. The sag of the hammock when occupied is around 4" off the floor, allowing the underquilt to fully loft and insulate. Warm down to 8* so far, and cool in the summer with lighter insulation.
My hammock hangs diagonally, drivers side at the rear and from the passenger side "B" pillar. Passenger seat is tilted forward for clearance.
I tried the webbing over the roof, and I had leaks. But it is a fair weather option.
I drilled and bolted a couple of cargo clips to the interior and now the hammock is completely inside.
