Hammocks
Realizing that I've already posted once, I'd like to chime in again with a note about hammocks. I routinely carry one (Trek-Light) on my maxi-scooter (Burgman 650), & I make good use of it for that mid-day siesta, when it's hot, I'm tired and saddle-sore.
Please note that hammock users do NOT have to sleep on their backs. The trick is to rest on the diagonal, which lets one rest & sleep as flat as they want.
The other alternative (which I don't have right now) is the Hennessy Hammock, which is bug-proof and will shelter a person in severe weather, including tropical downpours.
You don't always need two trees. Your vehicle and a stout upright post will do. I expect to stand up a 5' collapsible pole on the back of my Burgman's trike conversion (when done), sling the hammock to that pole, and run the line on the other end of the hammock to a post, pole, or other upright thing and then down to a root, concrete barrier or picnic table(or even to a stout nail driven into the asphalt of a parking lot -- pound it all the way in, just before you leave).
I've even figured a way to hang the hammock where there are no trees at all. However, you do have to find a 6'+ high chain-link fence. I've tried this, and, at near 300 lbs. weight & 6' 8" tall, hung successfully off said fence. No fence was damaged for this demonstration.