Most people need some sort of bottom insulation under ~70F...even just a single windproof layer can help. For ~65F it might be worth rigging up a simple poncho under there as an underquilt, just to see if you like hammocks.
Re: side-sleeping, a JRB Bear Mountain Bridge Hammock is the flattest lay from head to toe, but it's hard to pull my knees up when I'm on my side in there. If you hang the hammock right you can probably find your sweet spot where you can go fetal or whatever...just need to play around with the sag until you find it. The Byer isn't actually an asym hammock but you still lay diagonally in it. Same with the Hennessy line...only the bug net is actually shaped asymmetrically. The Warbonnet Blackbird has a footbox added that makes your sleeping surface asym, and much flatter.
FWIW, it often takes a few nights in the hammock of laying there comfortable enough to fall asleep but people can't quite doze off. It's a new foreign environment to get used to. I still do that on my first night out...but still end up getting more sleep than on the ground and feel a lot better when I wake up. So give it several nights as you get used to sleeping in a hammock and learn all the little tricks that will keep you comfortable. It's worth it!
“Republics are created by the virtue, public spirit, and intelligence of the citizens. They fall when the wise are banished from the public councils because they dare to be honest, and the profligate are rewarded because they flatter the people, in order to betray them.” ~Judge Joseph Story
- My site: http://www.tothewoods.net/
- Designer, Jeff's Gear Hammock / Pack Cover
IMPOSSIBLE JUST TAKES LONGER