I've always used the old Jeremiah Johnson trick to be comfy while hunting and sleeping in a tent. Dig a small fire pit and rake some coals into it and back fill, then pitch the tent over it and stack up a few blankets to sleep on. The heat from the coals makes it mighty nice and I usually sleep in my underwear in the tent or I get too hot.
I've slept in hammocks in the back yard before and I they're ok for lounging around but I couldn't get a good nights rest in one. That's bad when you have a hard day the next day to hunt. No hammocks for me.