I like my Marmot bag (I have a Never Winter). Its down and for the price it packs down pretty small. I looked into synthetic but unless you want to spend a ton, you won't find a synthetic bag as light, efficient and small-packing as a down bag. Just keep it dry, which shouldn't be too hard.

I highly suggest a Big Agnes Air Core sleeping pad. It packs down smaller than any closed-cell foam pad, allows for any sleeping position (side sleeper, back sleeper, etc), and is about as light as any other sleeping pad. The only downside is that it is inflatable, so you need to spend some time puffing air into it, and it *could* get a leak but it comes with a patch kit and seems very durable. The only other con is that it is pricier than a regular closed cell foam pad.