+1 on the pump bags. They are sorta multi-use. I have both the Schnozzle UL bag and the BA Pumphouse.

I use the Schnozzle it as a pack liner since it's shaped for that. It plugs straight into Exped pads of course and a few other types with similar valves. It's a pretty well thought out system, with a little strap so you can hold down the base of the sack with your toe while using both hands to gather air, fold and push the air into the pad.

I grabbed the Pumphouse bag for a pad with a different valve type. It's not as large a volume as the Schnozzle so it's not as good a pack liner and takes a few more sackloads of air to fill the pad, but it's actually easier for me to use when the pad is laid out in a hammock.

Theoretically, you can use either as a shower, too. Haven't tried that.