I am a big fan of simplicity. That coupled with the fact that I would lose my head if it were not bolted on, I chose to install an 18' piece of 1 1/2" poly webbing to each end of my hammock as a suspension.
There are no buckles, tree huggers, toggles or anything else for that matter to lose. I simply wrap the strap around the tree. It works great but is pretty bulky. Since 6-8' tree huggers would be used with a whoopie sling, I imagine the weight is not significantly greater than that of the whoopie sling suspension.
The whoopie slings are elegant and compact but my fear is that I would lose some componant, then be sleeping on the ground.
What is more important to all of you, simplicity or compactness/weight?