Welcome to the forums. As mentioned above, Cold Butt Syndrome is awful, but easily defeated with an under quilt. If you are good with a sewing machine, you can make your own.
Having two full sized hammocks is unnecessary for a single trip, as you can use a smaller hammock for your gear, or even sit it on the ground next to your hammock.
I highly recommend the Shug video series listed above by Mad777. Not only are they informative but wildly humorous.