I do carry recip blades in my kit. I have a heavy duty demolition blade, but I also carry Skil's "The Ugly" wood blade. This is a really aggressive pruning blade, and goes through green wood quite easily. I experimented with it when pruning trees & brush around the house.

I also have a skeletal handle that came from Lowes as part of a 3 blade set. It's cheezy, but really, really light weight and takes very little space. Not incredibly reliable, but with the Skil blade, took no real pressure from wood cutting. They don't seem to sell that version any more, darn it.