Another vote for underquilt or nothing when hammock camping, though I'm the cottage maker that @sunndog mentioned so somewhat biased. I'd only bring CCF pads if I was in mixed areas where Hammocks won't always be an option and I'll definitely be on the floor at some point: thick enough they'll always work.
If you don't have the money for UQ, they're bloody expensive for a decent one, you can use things like socks (some sort of enclosed structure around the hammock, a large blanket or sheet hung over ridge-line), use a cheap secondary hammock underneath the primary with some form of insulation like a jacket, blanket etc in the cold areas, a hot water bottle, or my favourite at the moment: a fire reflector.
If you don't have the money for UQ, they're bloody expensive for a decent one, you can use things like socks (some sort of enclosed structure around the hammock, a large blanket or sheet hung over ridge-line), use a cheap secondary hammock underneath the primary with some form of insulation like a jacket, blanket etc in the cold areas, a hot water bottle, or my favourite at the moment: a fire reflector.