I'll tackle the first question: No the standard suspension method is not ideal, although I would now recommend against using the rappel rings method. I've read a lot of people saying it can damage and eventually break your lines. And after inspecting mine I can say this is true. I've noticed that the polyester outer has been worn to the point that the spectra is coming through and beginning to show signs of wear in at least one spot. It's a real bummer because that is such a simple method. If you still want to use that method then I suggest using webbing instead of the stock suspension. Just attach the rap rings at the hammock end and use long webbing that acts as your tree strap and is long enough to reach the rings. 15'-ish on each end.
That or do what all the cool kids are doing and switch it out to whoopie slings.
"As a well spent day brings happy sleep, a well spent life brings happy death." -Da Vinci